Sixteen-year-old Mugi Tadano tries to shake off his latest heartbreak by working at his friend's aunt's beach-side inn.

However, when he returns home, he is surprised to find that Yuu and her younger sister Tsukasa are going to be his housemates, as their parents were mutual friends.

Yuu attracts several boys and even visits her hometown over in Tokyo, making Mugi so jealous that he follows her, and ends up meeting his ex.

Other girls visit their household, including Mugi's big sister-like childhood friend Sayuri who has become a model, and classmate Kiku Murakami, who tries unsuccessfully to smear Yuu's reputation.

A busty young woman, Mako Minamino, joins the household as Mugi's father's love interest.

Later stories involve more girls and relationships, including schoolmate Urara Haruno who has a reputation for dressing sexily, her sister Moe who enjoys reading romance novels, Tooko who is a Japanese idol in love with Mugi, and Tsukasa's friend Pepper from America who joins the household.

The hero is passive and wimpy, and the girl is an inscrutable abstraction, occasionally sad or peeved, but mostly fawning over Mugi despite the fact that he's accidentally seen her naked umpteen times."