Monster sex × puzzle-solving escape game! Long ago, the world was driven to the brink of ruin by just three monsters. But the great mage Buffet succeeded in sealing the monsters inside a candy, and at long last, peace came to the world. Hundreds of years later, that great catastrophe has been all but forgotten. Amelia Vertlet of the Kingdom of Gratia's Magic Corps is out on her usual patrol of the town.

Suddenly, she spots an old woman being attacked by a wolf in the middle of the street. After rushing to save her with magic, Amelia receives a candy from the old woman as thanks. But the moment she licks it, Amelia loses consciousness... When she wakes up, she's somewhere completely unfamiliar. It seems this strange mansion lies inside the candy that seals the monsters,
and Amelia has been trapped within the seal.

Here, the sealing power is controlled by the candy fairies. And believe it or not, the fairies tell humans and monsters apart by their intellect...! ・Puzzle solved → a human with intellect
・Puzzle failed → a monster without intellect
Solve every puzzle, and she'll be recognized as a human with intellect and allowed to escape. But every time she fails a puzzle, the candy's power whittles away at Amelia's defensive spell, "Soul Guard."
If her Soul Guard ever hits 0, she'll be deemed a monster and f○rcibly transported to the Sealing Chamber...