An indecent proposal: survive 5 days without ejaculation and you're free from the succubus. Submit, and there's no going back. A fully-voiced ADV. Care to get corrupted into a pitiful ejaculation sl*ve?
Temptation, seduction, allurement... Will you be able to stay sane when monster girls' cumsuckery and night prowling befall you!? This RPG has twelve heroines!