HenTyper

From the letters page: HenTyper: a puzzle game about parody, developed by zfreak1337. It runs on Unity and puts you in the role of a male protagonist. Status: finished, version Final. Available for Windows; 522 MB.

From the box: “HenTyper is a game that aims to improve your typing skills so you can do it in comfort. Games are made in hentai style with beautiful images. Improve your keyboard skills in this game. Find hentai manga for yourself.”