Behold, a great detective who thrills the world solving impossible cases in no time! His name? Keiichiro Nagumo. …But all of that was over a decade ago. Now he’s just...

Keiichiro Nagumo may have been a super great detective at one point, but now that he’s in his thirties, he’s just some dude. Appearing before this outmoded private eye is...

Having entered his thirties, former great detective Keiichiro Nagumo has lost every last glimmer of his former shine. Supporting him with a ray of light (her youth) is high schooler...