Season 1
Go Yoo and Joon-hee are two friends in high school with different tastes. So-yeon is the new girl that everyone is talking about. When Joon-hee becomes sick, Go Yoo gives him a kidney transplant and Joon-hee experiences cellular memory syndrome. Suddenly Joon-hee becomes like Go Yoo, and vice versa. The two friends become rivals for So-yeon’s love in the midst of their friendship. 15 years later, So-yeon and ‘Dr. Go’ coincidentally meet again.
Episodes
1 First Love May 5, 2023 
2 Things That Drove Us Crazy May 5, 2023 
3 Hope Brings Real Hope May 12, 2023 
4 Liking Someone With All Your Might May 12, 2023 
5 A Secret That Only You Didn't Know May 19, 2023 
6 Sadness Brings Forth a Strong Will May 19, 2023 
7 If We Don't Let Go of Our Hands Even When We Are in Conflict May 26, 2023 
8 There's No Ending to Friendship May 26, 2023