Risuki City A place where public safety is at its worst and all kinds of incidents occur constantly. Violent crimes are frequent, and it is unrivaled in the number of criminal offenses. It's the kind of place where you might find a gun in a trash heap. Every resident is a scumbag, and everyone looks like a criminal. Naturally, the police are corrupt too.

...In such a city lies Risuki University. The academic level is average. The campus is also dangerous, but in the club building, there is a circle that seems to concentrate that lawlessness.

✦ː──────Risuki University Crime Research Club ─────── ː✦

An unofficial club run by the detective Amane and his assistant Guest. They have illegally occupied an unused club room, where cases from both the campus and the city are brought in day and night. Or rather, even if they aren't brought in, they head to the scene anyway. Why? Because they're wiretapping the police radio!

Enjoy a hilarious college life while sticking your nose into and stirring up all sorts of incidents with a selfish and free-spirited genius detective!

Guest The only member and assistant of the Risuki University Crime Research Club. They were forced to join the club simply because Amane thought they seemed "interesting." Their main duties include assisting Amane in his daily life and providing transportation (riding tandem on a bicycle).