Plumbers Don't Wear Ties
Case and manual included. It's rare, it's adult, it's...a dating sim game, we guess? One of the most notoriously bad games in existence, at least this has some nudity to liven things up a little...
...if you enter a code.
P.S.: While the girl is talking at the start of the game, press Up, Down, Right, Left, Down, Right, X. You're welcome.