There is also an unseen man who seems to also get into sexual situations but mostly with the woman. The woman that's subjected to sexual situations is the Rhythm Girl from the title screen. It is an erotic parody of the game Rhythm Heaven Fever, specifically Remix 10, the final stage of the game, hence its name.
Rhythm Heaven Fever X, also known as Fever XXX, is a pornographic animation created by Korean animator/artist Minus8.
