Detectives in the special investigation team in Kanagawa go after criminal organization "Red Venius," based out of Yokohama. While pursuing the gang, the detectives turn into children due to exposure to a special gas. Dekachou (Fuku Suzuki) and the other detectives continue their investigation via an order from the National Police Agency. "Red Venius" then gives notice that they will they will assassinate the President of Tadzhikistan in Japan.

News about the disappearance of panties is still being covered every day. Kyosuke still wears Aiko Completo's panties to battle evil. Meanwhile, Aiko has mixed emotions and decides to get her panties back. Kyosuke suffers from the loss of Aiko's panties and disappears, but his biggest enemy yet is about to materialise.

Teru (Yutaka Kyan) is abruptly summoned to the Himuro-gumi office, where a tense Himuro (Yasukaze Motomiya) and Tamura (Yoshiyuki Yamaguchi) give him an unexpected task. A legendary Kyowakai yakuza known as “Hitokiri Jiro,” Fujita Jiro (Hajime Tsukumo), is being released on parole after 30 years, and Teru is to welcome him in their place. Expecting a fearsome figure, Teru instead meets a prison-worn old man who asks for work. Refusing Himuro’s offer to look after him within the organization, Jiro insists on living quietly as a civilian. He is sent to work at a kushiyaki restaurant, where his long absence from society quickly causes trouble. Meanwhile, Teru learns Jiro has family and sets out to find them, hoping to show them the man he has become.