Unidentified Crypt Heart

Unexplored pleasures, hunting, and dangerous love. Dangerous ecology of an unidentified young lady!? What appears before Mashima Yuma, a straight-laced and serious high school student, is a super sadist and sexual master who hunts down unidentified creatures [UMA](https://www.mangaupdates.com/series.html?id=22239234089) that appear with the mist, and a super super masochistic and talented maid. Will his new life in the town of memories be filled with joy, pain, and rose-colored days?