A youth romance about two men and woman who aren't blood related but treated each other as family during their teens and how they meet again after 10 years.
Despite not being biologically related, Kim San-ha, Yun Ju-won, and Kang Hae-joon 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-joon 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-joon, while the two boys are struggling with new romantic feelings for Ju-won and their own familial issues.