Koyomi is presented with a mystery posed by one of the female characters from the story, which he then investigates on his own or helps them solve. Book #15 of the series.
Aesthete, Epicure, Adonis, Orator, Artiste—Who’s your pretty boy?A mysterious group known as the Pretty Boy Detective Club is rumored to solve (and perhaps cause) most of the trouble at Yubiwa Academy
