Yamane Tasuku, a younger member of the Scientific Experiments Club alongside Ohtomo, is troubled by three things. The first is that Ohtomo picks on him too much. The second is that he's always left behind in conversations. The third and most troubling of all is that he doesn't know how to become a member of the Boy Detectives' Club. One day Yumeko approaches him, mistaking him for a member of the club and asking him to investigate a case in which the school's most attractive boys are becoming victims of theft. But Yamane is so pleased by the mistake that he accepts the job...
Hey! This says the odds that you'll 
go bald in the future are over 78%!
Hier steht, dass du in Zukunft
zu 78 % eine Glatze bekommst.
¡Oye! ¡Aquí dice que la probabilidad
de que te quedes calvo
Aqui diz que as chances
de você ficar careca são superiores a 78%!