Baby Beel is currently in a phase of non-stop urination that threatens to flood the city. Hildegarde manages to temporarily stop it with an inter-dimensional diaper, but in order to stop it completely, Tatsumi decides he needs to get a super absorbent diaper advertised on telly. Upon reaching the supermarket only to find the brand had already sold out, one of Kanzaki's henchmen, Shintarou Natsume, tells Tatsumi about the TKKH, the strongest delinquents in Ishiyama High, of which Kanzaki is one of them. Just then, the supermarket is taking hostage by a group of thugs. ...