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...
Who tries to pick up udon with 
their hands? You're a riot!
Wer greift denn Udon mit den Händen?
¿Quién trata de levantar el udon
con sus manos? ¡Eres muy gracioso!
Quem tenta pegar udon com as mãos?
Que piada!