Koishikawa Mitsuki is a first year high school student.
His parents say they want to swap partners with the Matsuura couple, whom they met while traveling, and all live together.
Miki is anxious, but the Matsuuras' son Yu, a high school freshman, remains completely unfazed.
Although Yu is such a cool guy, his appearance is a little too handsome, which makes Mitsuki's heart flutter...
Paperback: 284 pages
Publisher: SHUEISHA
Language: Japanese
Release date: May 16, 2008