Story
The protagonist, Masato Asakawa, is a 2nd year student at Kouyou Academy.

Due to his parents' sudden job transfer overseas, the protagonist and his freeloading former neighbor and childhood friend, Chihogi Senoo, are left alone in the Asakawa family's 3-bedroom condo. Even though he's preparing for his exams next year, the main character is excited about the prospect of being free from his parents and living a life of leisure.

However, the reality was not so easy.
Yomogi Senoo, Chihogi's older sister and a straight-laced shrine maiden, arrives as a supervisor.

And that's not all.
He accidentally rescues a popular idol, Ayase Miyashita, who was being followed by the media, and to his surprise, she ends up staying with him.
If that's not enough, an unfortunate girl named Noel Yukimura and an unidentified runaway named Hina also join him, and the 3LDK condo that should have been spacious is now a full house of women.

So begins a strange cohabitation of one boy and five girls living in 3 rooms...