Despite not being biologically related, Kim San Ha, Yun Ju Won, and Kang Hae Jun share a close bond with each other. The trio spent their adolescence raised by Ju Won’s father Jeong Jae and San Ha’s father Dae Uk, who did their best to give them a happy childhood as they healed from past trauma. Upon reaching adulthood, however, San Ha and Hae Jun sought out their biological families, leaving Ju Won behind. Ten years later, the five members of their found family reunite, but things aren’t the same as they used to be. Ju Won holds some resentment after feeling abandoned by San Ha and Hae Jun, while the two boys are struggling with new romantic feelings for Ju Won and their own familial issues. Can these chosen siblings work out their feelings with each other, and will romance form between them?