Miley Jab Hum Tum

The story begins at Excel College with the introduction of the basketball champion and college stud, Samrat Shergill (Mohit Sehgal) and the college diva Dia (Navina Bole) and their buddies Benji and Uday. Also studying at Excel are sisters Nupur Bhushan (Rati Pandey) and Gunjan Bhushan (Sanaya Irani), who left rural Morena for Mumbai. While Nupur loves fashion and is carefree, and believes that one day she will find the man of her dreams, Gunjan is an introvert and though being the younger one, is more responsible and spends most of her time studying. They are cousins of the "Queen Bee" Dia and "Dodo" Uday. Dia is horrified by the news of their arrival at Excel and does everything she can to make their lives miserable, but in vain. Lead athlete, college star Samrat and his close friend Benji (Abhishek Sharma) are Dia's friends. At the same time, Mayank Sharma (Arjun Bijlani) is introduced as the geeky Greek god of Excel, a close rival and later a close friend of Samrat.

While Gunjan is reluctant to make friends so early, Nupur tries different outfits to look modern but ends up as a fashion disaster. Dia and the gang rag both sisters. While Mayank rescues Nupur from being locked in the men's washroom, Samrat disguises himself as a shy, studious guy to make fun of Gunjan and later saves her from drowning in a pool. Nupur receives Mayank as a project partner, dance partner, and travelling partner, while Gunjan gets pushed into a talent parade by Samrat and returns the support by tutoring him. Some misunderstandings between Nupur and Mayank lead him to refuse to represent the college with Nupur in a competition. Dia dislikes the closeness of Gunjan with her crush and tries to bring down Gunjan in several ways but fails. Nupur and Mayank fight most of the time, but eventually, Mayank falls for Nupur when they go for the intercollegiate meet. He even saves her from goons which leads to injury in his shoulder. Gunjan becomes friends with Samrat when she realizes he is helping her build her confidence throughout the RJ hunt, wanting nothing in return. Samrat and Dia begin losing the spark in their friendship as he starts spending more time with Gunjan.

Meanwhile, Uday starts liking CJ. After the Holi party, Mayank drinks bhang and, under its effect, apologizes to Nupur for the misunderstanding that happened earlier. At the same time, Samrat drops Gunjan home and meets Dia outside her house, thus trying to balance both friendships. As time passes, Gunjan misinterprets subtleties from Samrat and begins to harbour an unstated love for him, just as he clarifies that Gunjan is his closest friend, unaware of his feelings for her while oblivious to her one-sided love. Mayank, disregarding his love, feuds with Nupur, though later they become best friends.

Sheena (Preeti Keswani), a talented and attractive actress, enters Excel with Ranvijay (Khushank Arora), a daredevil, rich and spoilt playboy. Sheena and Samrat strike up a relationship. Ranvijay almost hits Gunjan and Samrat with his bike, troubles Benji while he is with Samrat and flirts with Dia, which angers Samrat. Samrat dislikes Ranjivay and warns him to stay away from his friends. Seeing Samrat and her friendship weakening day by day, initially reluctant, Dia accepts Ranjivay's friendship as she feels that this would make Samrat jealous. Gunjan tells Samrat that Sheena will not allow their unique friendship to continue and asks him to stay away from Ranvijay. Samrat reluctantly agrees. Ranvijay gives Dia a ride to college on his bike while Samrat offers a ride to Sheena. They both have a bike race till college in which Samrat wins. He later rebukes Candy (the name given to Dia by Samrat) for taking a lift from Ranvijay despite having her car. She replies that he's not the only cool guy in college, and others can be happening too, indicating Ranvijay. One day, Samrat and Mayank fight with Ranjivay and his goons, in which Samrat gets hurt. Angered by the event, Dia slaps Ranjivay in front of the entire college and breaks their friendship. Ranvijay decides to take revenge on Samrat and Dia. He uses his charm to win Dia's trust and makes her fall in love with him. After rejection from CJ, Uday falls for the newly appointed Dramatics teacher, Tamanna. The entire gang bags a role in the college play organized by Uday. Mayank-Nupur, Samrat-Sheena, and Dia-Ranvijay are paired together. Dia and Gunjan do not like Sheena's closeness with Samrat but don't say anything. During rehearsals, Mayank realizes that his love for Nupur is inevitable and makes Nupur realize that she also loves him. During the college play, Mayank dramatically confesses his love for Nupur on stage, and they begin a relationship secretly with each other. Later, Dia plans a surprise birthday party for Uday and invites Ranjivay but doesn't invite Sheena. Samrat is upset with this and confronts Dia. Dia tells him that Sheena's wavelength doesn't match their group and that they talk to her only because of him. Dia also tells him that Ranvijay has proposed to her and that she's not said yes to him and wanted to ask her best friend before making any decision. Samrat explains that two people should have a strong friendship before getting into a relationship. Dia questions the reference to his friendship; should it be like Samrat and hers or Samrat and Gunjan's? This leaves Samrat baffled. Dia changes the topic by saying that he takes a lot of time in friendship but not in case of love indicating that Samrat and Sheena's relationship is going at lightning speed and there was no time for them to be friends first. Samrat and Dia try to be friends with Ranvijay and Sheena, respectively, for their best friend's sake and even agree to go on a double date. At a subsequent party, Sheena frames Gunjan for trying to drown her, but Samrat doesn't believe her and supports Gunjan and breaks up with her. After leaving the party, Ranvijay frames Samrat for a drunk driving crash. He also insults Dia by revealing that she spent a night at his house when she got drenched in the rain, thus fulfilling his revenge. The gang proves his innocence in court, and Sheena and Ranvijay leave. Dia has a change of heart. She now respects her siblings and friends more after seeing their support during her low phase. Mayank tries to cheer her up, saying that this incident has brought three positive things in her life- she got closer to her best friend Samrat, she got close to her family, and she also had a chance to make new friends like him. While Dia is surprised to see the newly changed Mayank, Nupur is thrilled that Mayank cares for her and her entire family.

During the brief time spent in jail, Samrat realizes his intense love for Gunjan because of others' remarks since that day. When he mistakenly calls Dia by Gunjan's name (Chashmish, as he often calls her) while saving her from falling off the ladder, he realizes that Gunjan is all over his head. Later, Gunjan believes that he has heard her extensive confession. Through a series of unfortunate circumstances, neither communicates their feelings leading to an extension of their friendship and a misunderstanding. Both sisters are hurt by their relationship difficulties and decide to immediately take a leave from Excel for an upcoming family wedding in Morena.

After the sisters leave, the gang feels lonely, knowing Dia and Uday will also go soon for the function. Mayank, wanting to apologize to Nupur for not hiding their relationship and scolding her, follows her to Morena and enters the Bhushan household posing as Nupur's childhood friend 'Bablu' who has come to consider marrying her. Samrat and Benji reach Morena as Dia and Uday's friends. Samrat finally expresses his love to Gunjan on the night of Dusshera. Mayank promises to commit to Nupur.

Mayank suddenly discovers that his mother has lost her job and leaves immediately without telling anyone. Nupur assumes their relationship is over and is furious. Her parents, Shashi and Ratna, form a negative opinion of Mayank. Ratna also faults Samrat for his disruption during a religious ritual and asks him to leave immediately. Touched by Samrat's apology, Shashi hands him the responsibility for his daughters. The gang leaves for Mumbai.

Back at Excel, with Samrat's plan, Nupur tries to convince Mayank but in vain. She faints while running to stop Mayank. Nupur and Mayank sort out their differences, and Mayank confesses his love to her in public. Samrat and Gunjan are delighted to hear this conversation via Benji while locked in a room initially set up for Mayank and Nupur. Samrat and Gunjan go on their first date. Mayank's mother finds a new job in Bangalore. While Mayank is gone, Ratna and the Bhushan family decide to marry Nupur and send the match, Bablu, to college. This new character is Adhiraj (Nishant Singh Malkani), Nupur's childhood friend and expected suitor. Adhiraj mistakes another Nupur to be the Nupur he is looking for. The gang takes advantage of this, and Adhiraj and the new Nupur begin to like each other.

The new Nupur gains everyone's trust and befriends them. However, she feels a strong affinity for Samrat. Her extreme concern for him creates doubt in Gunjan's mind. The new Nupur insists Samrat teach her basketball - an excuse to stay close to him. Meanwhile, Gunjan finds her passport, and it is revealed to her that the new Nupur is Suhani Shergil. Mayank returns to surprise his friends learns what the gang has been up to, and convinces them to tell Adhiraj the truth about Nupur. On questioning, Suhaani tells Gunjan that she is Samrat's long-lost sister and how Samrat lived alone from a young age and begrudged the entire family because of his parents' bitter divorce. In the custody battle, he was separated from his sister and has since believed that his mother chose his sister over him. Suhaani had been living in London with their mother before coming to Excel to reunite with Samrat. Gunjan agrees to help her reunite with Samrat. Samrat is irked by the habit of Suhani reminding him of his past. He often ends up losing his temper and shouts at her. While he's confused about his extreme behaviour towards Suhani, he gets concerned when he mistakenly hits Suhani with his basketball. But again ends up scolding her publicly when she asks him if his guilt of hitting someone the same way in his childhood. However, Gunjan always plays the peacemaker. Suhani cooks Samrat's favourite dessert, which nobody knows, making him suspicious. Suhani ties a good luck charm on Samrat's hand, wishing him all the best for the upcoming match in which Adiraj and Samrat both participated. Later, Mayank and Nupur learn about Suhani's identity. At a party, Samrat compliments Suhani when she is dancing, which makes her happy.

When Samrat hugs her while dancing, she is overwhelmed and can't control her tears and runs away for the party. Samrat goes behind her and gets severely injured while saving her from getting hit by a bike. Suhani panics and takes him to the hospital with the gang's help. Adiraj questions Suhani about her feelings for Samrat when he sees her in a miserable condition in the hospital. Samrat also confronts her about her concern and that she knows everything about his likes and dislikes. He rebukes her and suspects that she is hiding something. He refuses to take any rest unless Suhani answers all his questions. On further questioning by Adiraj and Samrat about Samrat and her relationship, she breaks down and kneels in front of Samrat. She reveals them being siblings. While Samrat refuses to accept her, Adiraj feels cheated, knowing she is not Nupur Bhushan. Samrat rushes to college and breaks open Suhani's locker to find evidence of her being his sister. He gets infuriated to know that Gunjan and his friends knew about Suhani's identity, and they, too, hid the truth from him. He refuses to talk to anybody, including Dia, who tries to sympathize with him.

Adiraj also misunderstands Suhani's intentions. When Suhani tries to stop him and trips on the stairs, he turns around to find Samrat saving her from the fall. Samrat schools Adiraj for hurting Suhani. While Samrat and Suhani reconcile and he takes her home, Adiraj decides to part ways with her. Adhiraj discloses this deception to Shashi, who then forces Nupur into marrying Adhiraj. Gunjan and Samrat also reconcile when he hears her crying on the phone about Nupur and Adiraj getting married, as Adhiraj consents to the marriage in anger at Suhaani's betrayal. Mayank, however, cheers up and upsets Nupur by attending all the wedding functions in disguise, promising her he will not let the wedding happen.

On the wedding day, Adiraj is finally told that the gang played this prank because Nupur loves Mayank, and he must believe that Suhaani is genuinely in love with him. Adhiraj soon decides to call off the wedding. Still, before he can tell his father, Uday accidentally knocks him out, so Mayank reluctantly replaces Adhiraj at the wedding ceremony. Mayank and Nupur marry, but Shashi disowns her, feeling betrayed and humiliated by their rash actions. With nowhere to go, the couple turns to the gang for help. The gang temporarily arranges for them to stay in a beautifully decorated college classroom for the night. Dia finally calls Mayank as brother-in-law, which makes him realize that he is family now.

Soon, the couple shifts to Samrat's guest house. Gunjan and Nupur disagree, with Gunjan understanding their father's anger and Nupur objecting to Gunjan and Samrat's supposed indecent proximity on their second date. The sisters soon restore their relationship when Nupur protects Gunjan from being eve-teased by thugs. On Valentines Day, Adhiraj proposes to Suhaani, upsetting Gunjan, who had expected a proposal from Samrat. Gunjan tells Samrat about the importance of marriage before leaving the party alone. The same armed thug corner Gunjan and harass her when Adiraj comes and saves her by fighting with the goons. During the fight, Gunjan gets shot and is rushed to the hospital. Adiraj is sent to jail, accused of trying to kill Gunjan by shooting her. After Samrat's heartfelt proposal, Gunjan recovers to find herself paralyzed from the waist down. At the hospital, Shashi forgives Nupur and, once home, tells Gunjan that he approves of Samrat. Gunjan, however, remembers Samrat not being ready for the marriage commitment before the accident and, thinking of herself as a burden, assures her father that she is not in love with him.

The thugs try to throw acid on Nupur and Gunjan, who Mayank and Samrat save. Next, Nupur battles the culprits - a well-known corrupt politician and his brother- by putting her life in danger, getting them arrested, and becoming Excel's role model. Because of the accident, Gunjan is not confident about walking on her feet. Despite Samrat's several attempts, she fails to stand. The gang finally decides to go on a vacation to make Gunjan walk again. The gang makes a story about a king's ghost at the resort who kills everybody in his path. The gang implies Samrat's impending death by the king's spirit for Gunjan when Samrat truly gets unconscious and falls in danger's path. However, Gunjan cannot move and asks for help, and the gang runs to help Samrat see a road roller coming towards him. But eventually, Gunjan bolts up and runs to save his life, thus recovering fully. They celebrate Gunjan's recovery by dancing. While Samrat dances with Dia, Benji gets jealous and asks Samrat to allow him to dance with Dia. Benji starts developing feelings for Dia.

The gang returns home with their relationships strengthened. Still, their happiness is short-lived when a baby girl, as a prank, enters the life of Samrat, Mayank, Benji, Adhiraj, and Uday with a letter falsely claiming that one of them is the father. Boys and Girls hire detectives to find out about the baby's birth father and mother, suspecting that it is someone from the group. Doubts rise on Samrat and Mayank when Riya- the Principal's daughter, visits Excel College, who is doubted to be the baby's mother. Samrat and Mayank indulge in an argument when Samrat finds out that in the first year, Mayank kissed Riya while she was still Samrat's girlfriend. Later, Riya rebukes all rumours and leaves. The girls band together against the boys to participate in several tasks to prove themselves more responsible. Mayank saves Gunjan from a severe accident in one of these tasks, which makes Nupur guilty as she only thought of winning and did not stop to help her sister, whereas Mayank didn't mind losing to save his family. After a series of mishaps, it is finally revealed that the entire gang is on a reality show. Suhaani breaks the news that she has to return to London. Adhiraj decides to go with her and get married.

A famous director, Neil Oberoi, comes to Excel for an open casting call. He is an old friend of the Bhushan sisters and has a soft spot for Gunjan. After purposefully casting Gunjan, Neil's growing closeness with Gunjan makes Samrat overprotective. Through this, Gunjan learns that Neil is in love with her, so she leaves the film and reconciles with Samrat. Meanwhile, Mayank and Nupur enrol for the same job scholarship, and Nupur wins it. Mayank and Nupur split after a row, and Nupur goes to Delhi. Later, Mayank and Nupur determine their differences and retake their wedding vows, and Samrat confesses his love to Gunjan. Samrat proposes to Gunjan, and she happily accepts, and later, they consummate their love. Benji also reveals his love for Dia. Mayank and Nupur decide to go to the United States, leaving nothing behind. As Nupur, Gunjan, Mayank and Samrat speed to the airport, the brakes suddenly fail, so Samrat careens the car off the road, and the principal characters are involved in a life-changing accident.

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