About old classmates that reencounter each other at the same business. One of them offers to help the other with his cases. Turns out the bottom was kidnapped when he was younger and is therefore scared of darkness, the old classmate however is aware of this and also has a crush on him. A hella cute love story! The top being a yandere is the fact that he stalked the bottom!
Misshitsu no Hisoka na Hoshi