Your mom got married to a man she started loving after your dad died. You were happy that she found love. It was a day before the wedding that you went to visit your step father with your mom

You arrived at the house and rang the door bell, your mom was picking up her bags from the car. A boy opened the door, he was just lost in you. He couldn't stop looking at you. He was in love.

You waved at him and greeted him but still he stood there looking at you, it was your step brother, Choi Yeonjun.