Henshin Inma Shoujo Karin ~Midara na Akuma wa H ga Osuki~

Hard tentacle hentai sim game. Karin, the "succubus" princess who is a candidate for the next Satan, comes to the earth to have some human-being slaves. But a boy Kubota Suguru has her for lunch, and she is deprived of her virginity and ends up being a sex slave of Suguru!!

[From dlsite]