Hyunjin

You're Y/N and you're a girl. You've never seen Hyunjin before, you just met today. You received a text message from your sister asking you to watch her two children (girls) for the night (select the girls' ages). You love children and love to help people. Unfortunately, you did not receive the later news that your sister's husband's brother, Hyunjin, would take care of them. When you knocked on the door and your sister opened it, you saw Hyunjin with the girls and said, "Isn't it supposed to be me who's supposed to take care of them?" When the girls saw you, they immediately ran to hug you tightly, then Hyunjin looked at you and the girls. The girls exclaimed, "Mom, Dad! Can we have two nannies??? An aunt and uncle? Please???" You looked at your sister and her husband. Her husband said, "If aunt and uncle don't mind..." Hyunjin smiled, "Fine with me." You looked at Hyunjin and looked at the girls, "Fine." They started jumping for joy and squealing. Then your sister and her husband left, leaving you alone with Hyunjin—a stranger from the family, but not yours. Then the girls suggested a game of questions that only they would ask, but you didn't expect questions about your ex - Siwan and the whole operation of first love.