Happy 300 Days

• Tammy Chen as Chen Ya Ting

A hotel customer representative who quits her job and goes back to her childhood home to live with her mother when she finds out she is pregnant with her ex-boyfriend's child. She and Qi Tian were high school classmates who she found annoying and conceited. Afraid that her mother will be furious with her if she finds out that she is also a unwed mother she agrees to let Qi Tian lie and pretend to be the father of her unborn child.

• Kingone Wang as Qi Tian

A talented but arrogant interior designer. He is fired from his job when his uncompromised attitude causes his design firm to lose an important client. Bored at home he is conned by Gigi to take her on as a client. He was in love with Ya Ting when they were high school classmate, but she rejected him because in each of his love letters to her he wrote it in a self-centered tone. He volunteers to be Ya Ting's unborn child's father because of what his college ex-girlfriend did to their unborn child.

• KunDa Hsieh as Zhang Yao Yang

A small time gangster. He escapes to Ya Ting's hometown when he thinks he has killed a man while trying to collect a debt from him. An orphan who joined a triad gang when the triad boss paid for his died grandmother's medical bills. He falls in love with Ya Ting at first sight and goes to the "Spring Breeze Inn" to look for her. Gigi discovers his talent for cooking and hires him as the chef at the inn.

• Kaiser Chuang as Ding Hao Quan

A respected doctor, he losses his confidence when one of his patients dies during surgery for the first time. Unable to cope with the trauma he turns to alcoholism. He meets Ya Ting when she saves him from committing suicide and later goes to Ya Ting's hometown to visit the grave site of his patient.

• Grace Ko as Chen Xiu Zhi

Ya Ting's mother. She owns the "Spring Breeze Inn" that is later renamed "The Light Inn" which she inherited from her father. Her unique but tacky decorating style causes customers to not want to go to her inn. In order to try to get customers to her inn she tricks Qi Tian into taking her on as a client. Like Ya Ting, she was a unwed single mother.

• Jenna Wang as Joanne Xu Xin Ping

Qi Tian's college ex-girlfriend. Not wanting to be tied down after college she does the unthinkable to her and Qi Tian's unborn child in order to advance in her career which leads Qi Tian to break up and hate her. She constantly uses her connections to give Qi Tian work and recognition in hopes that he will forgive her and reconcile with her.

• Albee Liu as Mi mi

A nurse that works in a small clinic in Ya Ting's hometown. She admires and likes Ding Hao Quan because he gave her confidence and encouragement while she was training to be a nurse.

• Wang Dao as Ding father's

Ding Hao Quan's father.

• Bao Zheng Fang as Ding's mother

Ding Hao Quan's mother.

• Ding Qiang as Grandpa You

A tourist that has always stayed at the "Spring Breeze Inn" when he visits Ya Ting's hometown with his wife. His real name is Zhou Míng Da but due to his wife's accident she only has memories prior to meeting him so he pretends to be her previous husband in order to make her happy.

• Ma Zhi Qin as Grandma You

A tourist that stays at the "Spring Breeze Inn" whenever she visits Ya Ting's hometown with her husband. Due to an accident she does not have any memories of her current husband so he takes her previous husband's name in fear that she will leave him.

• Guo Yao Ren as Da Fei

One of Zhang Yao Yang's triad followers who was with him when he thought he had killed a debtor they were trying to collect from.

• Yao Chun Yao as Shan Ji

One of Zhang Yao Yang's triad followers who was with him when he thought he had killed a debtor they were trying to collect from.

• Michael Huang as Bao Ge

Yao Yang's triad boss who took Yao Yang in when his grandmother died and he helped to pay all her medical bills. He finds Yao Yang hiding at "The Light Inn" and forces him back into a life as a gangster.

• Kelly Huang as Doctor Huang

Ya Ting's gynecologist who is with her throughout her pregnancy.

• Hope Lin as Hao Si Yi

Ya Ting's boss at the "H Hotel". She hires Ya Ting as a temporary event planner at the hotel.

• YuYu Xuan as Xiao Xing Fu

Ya Ting's daughter at age 5. Wanting to know who her father is she sneaks off to Taipei to look for Qi Tian.

• Wu Chun as himself

A celebrity that Ya Ting is a huge fan of. Ya Ting meets him while he is filming a commercial at the hotel she works at.

• Ken Huang as debtor

A debtor that Zhang Yao Yang is trying to collect from. When a bottle hits his face and causes him to pass out, Yao Yang mistakes that he had killed him.

• Duncan Chow as Jun Jie

Qi Tian's college classmate that is now an editor for an interior design magazine. He goes to the refurbished "The Light Inn" to do a cover story on Qi Tian.

• Bao Wei Ming as John

Qi Tian's long suffering former boss who has put up with Qi Tian for many years but decides to fire him when Qi Tian causes him to lose an important client.

• Liu Er Jin as Client

A client of Qi Tian. Qi Tian becomes annoyed with him due to his constant phone calls during his presentation to him and also asking Qi Tian to change his designs.

• Angel Chen as Ya Ting's co-worker

Ya Ting's fellow co-worker at the "Capital Hotel" who becomes annoyed with Qi Tian due to his nitpicking requests.

• Monica Yin as Ah Jiao

Zhang Yao Yang's ex-girlfriend who he always ask for money when he is on the run. She gives him money one last time and request that he never comes looking for her again.

• Shen Shi Hua as Gynecologist

Ya Ting's doctor who lets her know that she is pregnant.

• Zhu De Gang as Uncle Dong

A residence at Ya Ting's hometown who comes to pick her up from the train station.

• Gina Lin as Xiao Yao Ji

Gigi's next door neighbor. Gigi does not like her because all the tourist flock to her inn since it is better decorated then Gigi's.

• Kao Ying Hsuan as Jia Hao

Ya Ting's cheating ex-boyfriend. When he finds out that Ya Ting is pregnant with his child he tries to force her to abort it.

• Wang Man Jiao as Grandma Ya Ting

A patient of Ding Hao Quan that has the same exact name as Ya Ting.

[5][6]

• Zhongshan District
  • Capital Hotel[8]
  • Shin-Kong Mitsukoshi Department Store

• Kenting Township
  • The Light Inn
  • Zhutian Station 竹田車站
  • H Resort Hotel[9]
  • Hengchun Christian Hospital
  • National Museum of Marine Biology & Aquarium