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!

"The Secret Game of the Park" is a touch-based simulation game where players interact with a quiet girl engrossed in a game at an empty park. Over several days, players subtly touch and "develop" her while she’s distracted, aiming to progress without being noticed. Featuring Live2D animations, multiple touchable areas per scene, and a free-touch experience, the game is built with Unity and Spine2D, running at 1280x720 resolution with mouse controls.