The famously prickly Isomura-san has made a vow. That vow is—I WILL NOT FALL IN LOVE! In fact, Isomura-san is a Stage 5 Clinger who can't get enough of guys. In the past this habit caused him to hurt his live-in niece Hina, and so he has vowed NEVER TO FALL IN LOVE UNTIL HINA IS LEGAL. Thus he plays the prickly part of a prickly person, pushing others away. But then, one day, Hina said: I WANT TO BECOME A DETECTIVE! And things got flipped, turned upside down. Enter Uzuki, the Detective Instructor. It's love at first sight for Isomura-san, so what's a fraudulent loner to do?! He's completely at Uzuki's mercy! Is a lovey-dovey victory on the cards? Or...

"I want to be taught how to kill people." Middle school student Ibaraki Sumika is curious about transfer student Hosogai Shuu, who has begun living in the Western-style mansion behind her house. The reason is that her friend Noe told her that Shuu has committed a crime and is on probation... (source: Birz Comics, translated)