Shohei Matsumoto lands his first job at the prestigious Kyourin Laboratories. The position is too good to be true. Great colleagues, amazing facilities and the opportunity to continue the work of his thesis? The gods must have truly blessed him.

The lab's namesake Eisaku Kyourin takes him under his wing as a mentor and friend. But something doesn't add up. The hallways are always strangely empty. The samples he's working on disappear one after the other. And who is that enigmatic man in all the photos in Kyourin-sensei's office? Shohei should have never found out...