Seitarou starts his first year of highschool by moving to the Goukoukan school away from home. Of course he is to move to the dormitory so he is surprised when told that he will be staying in the girl's dorm! To be precise he will be staying in an appendage of the dorm because the boy's dorm is full. That day he meets with the other residents (who are of course, all girls), Asagiri and Aisa are his senpais, his childhood friend Itsuki, Houmi the school chairman's daughter, the timid and petite Yao, the bright Touko and the childish teacher Chiyori.
One year later all the members of the dorm are like a close knit family, while everyone spend their time and energy doing what they love (be it club activities or student council duties) Haruto uses his now famous cooking skills to make sure food is ready when they wake up in the morning and come back after school. With the addition of two first year girls the clumsy Mikamo and the serious Suzume the new school year starts, who will Haruto end up with?