is a highly popular, tactical anime role-playing game developed by Shimofumi-ya and published by OTAKU Plan . The game strands a human protagonist in a dangerous yet seductive realm ruled entirely by powerful monster girls.

The screen didn't flash. It didn't show the glossy, anime-style logo of the public release. Instead, the screen turned a deep, velvet black. Then, text appeared in a serif font, white as bone:

: Navigate complex mazes, discover hidden paths, defeat powerful bosses, and collect key items to return to the human world.

Critics highlight the high-quality boss fights, such as the spider succubus or the giant succubus, which often require specific strategies and pattern recognition.