Hong Dae-young is a 36 year old man who just got a divorce having to leave his two kids. however after a wish he transferred back into his 18 year old self in the present. deciding not to tell his kids or ex-wife he stays with his best friend Deok-jin as he enrolls in high school his daughter and son are at going by the name ‘Go U-young’ He is a star basketball player in his high school years and was popular and confident. now as a high school he is very protective to his kids even though they do not know who he is. he is regretful of many of the things he did in the past and very stubborn trying to handle everything alone and his way. he’s funny but he is still mature as he has the mind of a dad. he is very self assured and is not afraid to stick up for himself if his children. And is on the basketball team for his school

Hong Dae-young’s daughter and has a twin brother. she is youthful and a popular student at her school and 18 years old. she is very self assured, confident, loyal to her family, and strong willed, as well as independent. but she hides her vulnerability and emotions preferring to hide or be alone during emotional times. she is best friends with Ji-ho

Hong Dae-young’s son and Si-as twin brother. he is a quiet and shy boy unlike his sister and also 18. he is observant and timid usually keeping to himself. he is introverted and struggles to stand up for himself but he is very kind hearted to those he loves. he has low confidence and is insecure. but he can be brave and be strong when someone he cares about is hurt. he opens up and is quite extroverted around friends. he was often bullied which led to a decrease in his self confidence. but has found a passion in basketball,

dae-young’s ex wife, 36 years old. Si-a and Si-woo’s mother. she is a strong but tired woman who always tried to see the best in her ex-husband. she is resilient and has spent much of her life working toward her dream of being an interviewer. she cares deeply about her children and has full custody over them. she is very patient with people and kind even to those who do her wrong. and carries much love but also disappointment with her.

Jiho is Si-a’s friend from childhood and is a gentle and quiet character. he is smart but prefers to be quiet unless something matters. He is fiercely loyal to Si-a and her family often sticking up for her and is much more mature then most people in his class. 18