Synopsis

Otae and Shinpachi received an invitation to Kyubei's birthday celebration. They arrived at the Yagyu mansion bearing a cake, only to discover the hall teeming with figures from entertainment, politics, and a multitude of other fields. As a sense of displacement began to settle upon them, they spotted Gintoki, Katsura, Hasegawa, and Kamenashi (shell absent) in the midst of considerable uproar. Such a collection of individuals together invariably presaged chaos.