恩姬在寄宿公寓的多事生活始于三位女士:一位性感的寄宿公寓老板,她更性感的女儿,以及他天真的初恋。大一新生恩基来首尔读书时,在母女经营的寄宿公寓里找到了新的住处。他唯一的乐趣是在与母亲或女儿的不言而喻的推拉关系中玩耍。有一天,天真温顺的初恋顺义突然来宿舍看望他。门后是宿舍的性感女儿,房间旁边的浴室里是曲线玲珑的宿舍女主人,20岁的处女恩基的不眠之夜开始了。

Eun-gi's eventful life in a boarding house has begun with the three ladies: a sexy owner of a boarding house, her daughter who is even sexier, and his innocent first love. Eun-gi, a freshman, has found his new place in a boarding house operated by mother and daughter when he came to Seoul to study. His only pleasure is to play along in the unspoken push-and-pull relationship with the mother or the daughter. One day, his first love, Soon-yi, who is innocent and docile, suddenly comes to visit him at the boarding house. With the sexy daughter of the boarding house behind the door, and the curvaceous lady owner of the boarding house in the bathroom next to his room, the 20-year-old virgin Eun-gi's sleepless night begins.