Kishimoto Kasumi, a 15-year-old girl, was supposed to live at her aunt's house to attend high school since April. However, when she moved in, she was surprised to find that there were already four new male students living in the same house. To make matters worse, that day while she was taking a bath, Takasugi Yusaku, one of those boys, walked in and saw her naked. This is how Kasumi's troublesome high school days began.







