Love Letter (TV series)

As a young orphan, Lee Woo-jin (Andrew) received horrible treatment while growing up under his aunt. When his uncle comes back from Italy, his uncle a priest decides to raise him. Eun-ha, another orphan is brought to the cathedral as well. Although initially antagonistic to Woo-jin, the two becomes inseparable friends. At the end of high school, Eun-ha is about to confess her feelings for Andrew however Andrew tells her of his dreams to become a priest.

Andrew and Eun-ha leave the cathedral to attend college. Andrew meets Jung Woo-jin and the two become close friends. Jung Woo-jin falls in love with Eun-ha but she rebuffs his attentions. The love triangles causes hurt and pain for all 3 friends. It is brought to a climax where Andrew writes Eun-ha a love letter but Jung Woo-jin destroys the love letter without Eun-ha reading it.

Andrew returns from the seminary but has not taken his final vows of priesthood. Eun-ha develops a heart condition and before the final operation makes Andrew promise to fulfill his dreams to become a priest. After the operation Eun-ha slips into a coma. Jung Woo-jin is finally able to escape the love triangle and Andrew takes his vow to become a priest. Eun-ha awakens from the coma and Andrew agrees to take care of her.

• Jo Hyun-jae as Lee Woo-jin (Andrew)

Lee Woo-jin was raised by a cruel aunt before being taken to live with his priest uncle. Although he believes his mother has died, it is later revealed that she abandoned him to become Jung Woo-jin's stepmother. Kind and introspective, he wrestles with his desire to become a priest with his feelings for Eun-ha. He studied medicine in university and is a trained surgeon.

• • Yoo Seung-ho as young Lee Woo-jin/Andrew
• Soo Ae as Cho Eun-ha

Another orphan taken into care at the seminary after the death of her mother. Although antagonistic at first to everyone, she slowly develops feelings for Lee Woo-jin. She is caught between affections from Jung Woo-jin and her own unrequited love for Lee Woo-jin. A life-threatening heart condition makes her ask Lee Woo-jin to choose priesthood over her. Although the surgery on her heart was a success she slips into a coma. She awakens from a coma at the end of the series ready to spend the rest of her life with Lee Woo-jin.

• Ji Jin-hee as Jung Woo-jin

Although initially friendly to Lee Woo-jin, his jealously of the relationship of Eun-ha and Lee Woo-jin as well as the discovery that his stepmother is Woo-jin's biological mother causes him to act out of character and sabotage Lee Woo-jin's attempt at happiness. Like Lee Woo-jin he is also a qualified surgeon. He has unresolved issues with his father for leaving his biological mother and although he rebels against him, he finds himself turning out to be exactly like him.

• Son Hyun-joo as Father Peter

Father Peter is Lee Woo-jin's maternal uncle who raised him in the church after rescuing him from a cruel paternal aunt.

• Kim Young-ae as Dr. Im Kyung-eun

Im Kyung-eun is Lee Woo-jin's biological mother who abandoned him at birth.

• Kim Yoon-kyung as Seo-young

Eun-ha's friend.

• Kwon Min-joong as Sister Esther
• Yoon Yoo-sun as Sister Gemma
• Yang Hee-kyung as Maria

Father Peter's cook/housekeeper.

• Joo Hyun as Dr. Jung Myung-woo

Im Kyung-eun's husband and Jung Woo-jin's father.

• Choi Jae-hyung
• Seo Hyun-ki
• Son Young-joon

Jung Woo-jin's friend

• Jung Mi-ae as Andrew's high school classmate
• Han Ye-rin as Hee-jin

Lee Woo-jin's cousin.