Fresh out of jail, a smart-mouth wise guy Goro takes the name “Big Brother Katsumata.” Not fitting in well with established gangs, he forms a rag-tag gang called “the Shinjuku Brothers.” The members of their gang are thugs who only wish they were traditional yakuza. When they turn up at the funeral for a gangster, they are not welcomed, but a senior boss intervenes to keep things calm. The boss of bosses invites them to join a respected local council of warlords. Katsumata is suspicious of why such powerful men would extend an invitation to lowlife like himself.

An undercover cop goes to Okinawa to fight the narcotics and prostitution trade.

人に言えない悩みのために自信をなくしていた男が自信を取り戻していく様を、お色気を交えてコミカルに描く。早田勇は自動車メーカーの営業マンだが、人には言えない「早漏」という悩みが仕事にまで影響して成績はいつも最下位。あげくの果てに会社をクビになってしまう。途方に暮れた勇は偶然再会した大学時代の友人・細井が研究する「早漏防止用コンドーム」の開発を手伝うことになるが…。萩本欽一、大村崑ら大物喜劇俳優が特別出演している。