An infinitely playable erotic sandbox! Follow Eguchi-san, a girl who loves naughty fantasies, as she indulges in perverse acts in a ruined marshland setting. Urinate freely in decayed mansions or murky lakes, use endless adult toys, and change into various costumes! Masturbate anywhere, anytime, with unique location-based erotic gimmicks and perverse monster encounters in a wild, uninhibited fantasy world!