"From today, you'll be the dorm manager here, and also the acting coach of our club♪" Sota is suddenly made the dorm manager and coach of the Kitaei University women's volleyball team by a single word from his older sister, Kaoru. There, he finds his first love, Ayano, and experiences a fateful reunion... but in the girls' dorm! In the gym! In the hotel!? What awaits him are days of being tossed around by girls who are bigger than him!