Boin

Boin 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.