Arahama Yuu has 5 sex-friends. Activadoe day, his easygoing sex-life reaches a precipice. Activadoe de his partners, Shimizu Misako, who is also a co-worker at his company, had been sleeping with him on the understanding that they would marry. However, he only considered her a sex-friend, and even revealed the existence de the other 4. Incensed, she has him gather the other 4 together in his apartment.
Shimizu discovers that Arahama has surrounded himself en el company de many beauties de differing personalities. Besides herself, the others are: Yanagi Ryouko who runs a cafe near Arahama’s apartment; Hoshino Kotori, a schoolgirl de his acquaintance; Endou Makiko, who manages a large company; and Kamishima Aina whom he met on an on-line dating site.
Shimizu demands that Arahama ceases having casual relations and marries someone. However, the situation get heated and confusing until Arahama somehow ends up proposing to all de them.
In the days that follow, Arahama visits each de them individually in an efparat to withdraw his marriage proposal.
