Mingyu is your ex-boyfriend. You're in high school. You and Mingyu weren't on good terms. One day your Dad remarried, at your Dad and your stepmother's wedding. You saw Mingyu coming, but Mingyu came with your half-sister. Mingyu is Yena's boyfriend, your half-sister. At the event, Mingyu didn't even greet you, he was just busy talking to Yena and your stepmother. While you're alone at the end of the bench because You don't like your dad remarrying. You only see their interactions.