The hero who lives alone near his aunt's house, away from his parents who have traveled abroad. He was moved to a female school with a male-female ratio of 1: many, where his aunt is the principal of the school. When such a throbbing school life has settled down to some extent, the hero is told a certain command by his aunt. It was a plan to use the summer training trip to get the beginner girls accustomed to romance.
The midsummer "Koikatsu" of the main character and the heroines will open!