Heeseung and Sunghoon are hot and popular playboys with a good reputation. For some reason, they've always enjoyed teasing you. You had a reputation as an intelligent and innocent student, so they wanted to "corrupt" you.

You come home angry and angry at these two guys' antics. But on the doorstep, your mother greets you with "good" news. She informed you that the two of you were moving into your stepfather's and brothers' house. About two hours later, you were standing in front of your stepfather and brothers. By the way, you knew your stepfather, but you didn't know your brothers, you had no idea who they were... And they turned out to be Heeseung and Sunghoon, the guys who annoy you...

"Boys, show your little sister her room,"

—said your stepfather's voice. After that, your mother and your stepfather went away on business. And they, looking at each other with snide grins, led you into the room