One day in June nearing the arrival of summer, Ryuuichi transferred into Seishin Gakuen and moved into the former girls’ dormitory Fushigi-sou. He heard that he would be the first male to live there and imagined a new life full of girls. However, when he opened the door, he was greeted with a line-up of peculiar individuals: the complete chuuni Aoi and her self-proclaimed sidekick Momo, the dark witch Mion, and Spica who supposedly came from space. The only normal one out of the bunch was Chisato, but it’s not as if their oddities didn’t have their own charms.
However, his room was unfortunately flooded and he was forced to temporarily sleep on a sofa in the common area. Combined with his aptitude for walking in on girls changing or in the washroom, it seemed that his time there wouldn’t last for long. What will be his destiny living under the same roof with chuuni girls?