While others are reincarnated as beautiful people or cute animals, one person ends up possessing a gloomy monster hiding inside the male lead’s wardrobe. Worse still, it is the cruel monster meant to torment him and eventually burn to death in the original story. But somehow, the monster begins to grow closer to the boy whose room it secretly lives in. As their unlikely bond forms, the doomed closet monster may finally find a way to change its fate.