Otae and Shinpachi are invited to Kyubei’s birthday party. The two arrive at the Yagyu mansion with a birthday cake in hand, only to find the place filled with celebrities from the entertainment and political worlds and other various industries! When... (more) the two begin to feel out of place, they spot Gintoki, Katsura, Hasegawa, and Kamenashi (without his shell) causing a huge commotion. Naturally, with these members together in one place trouble is bound to happen…