A high-teen romance that tells the story of youth who cannot give up both love and friendship. Two best friends, Go Yoo and Go Joon Hee, fall into a love triangle with the appearance of transfer student Han So Yun, who falls in love at the same time. On top of that, after Go Joon Hee receives a kidney transplant from Go Yoo, the mysterious story that occurs when the characteristics of the organ donor are transferred to the beneficiary is added.