Boin

Boin (ボイン) is a Japanese eroge visual novel developed by Crossnet-Pie, a subsidiary brand of Crossnet, which is known for visual novels such as Maple Colors, Ayakashi, and Kanojo x Kanojo x Kanojo. 'Boin' (ぼいん') is Japanese slang for 'big breasts'. It is followed by its sequel Resort Boin. A DVD player game version and a UMD was also released.

Plot
Daisuke Ichijō (一条大介) is a new teacher in school. He became popular with everyone in a matter of days. He conducts a class that allows his students to role-play as whatever they wish to be when they graduate, but some say this is a plot to spend extra time with the girls, and the girls expect more than just lessons.

Anime adaptation
A three-episode anime OVA adaption was made by Milky Animation Label. Two volumes have been released in Japan.

Sequel
A sequel titled Resort Boin was released on March 16, 2007.

Reception
Boin debuted as the 3rd best selling bishōjo game of its week.