This story is about a lucky girl who auditioned to be Exo's noona in their dorm.. She's gonna experience life with her idols, specially with her bias, Oh Sehun.. At first, they won't go along well, but as time passes by, he would start to fall for her but then there would be this another girl who would ruin their relationship, not just with Sehun but the whole EXO as well.. What would happen with all of them? Will they be able to maintain their relationship? Will she be replaced as Exo's noona?