A young woman approaches the Boy Detectives' Club and asks them to find the intended recipient of a series of threat letters her boyfriend made. They accept the job and begin to tail her boyfriend. Meanwhile Kobayashi, after missing his chance to return Hanasaki's dropped wallet, uses it to buy a desperately needed meal. Hanasaki finds out by checking his electronic money usage history, and he convinces Kobayashi to join him on the current investigation in a second attempt to get him to join the club...
When we get there, I'll get 
you whatever you want.
Wenn wir da sind,
kriegst du, was immer du willst.
Cuando lleguemos, te daré
lo que quieras.
Quando chegarmos lá,
comprarei o que quiser.