Onechanbara might not be a computer game, but that's not stopping it from getting a boob mousepad.
Boob mousepads have been around for a few years, and it seemed like every Japanese game was getting one a few years back.
This Onechanbara one, priced at ¥5,800, is tied to the upcoming Onechanbara Z: Kagura. If you are not familiar with Onechanbara, a series that has spawned sequels and movies, these screens should bring you up to speed.
『お姉チャンバラＺ ～カグラ～』おっぱいマウスパッド [SBCr Shop]