During the Bloody Halloween, Manjiro ended up in a 1v3 fight against Kazutora with his limbs bound. After Kazutora hits him in the head with a pipe, Manjiro ends up on his knees. The Valhalla members see this as a chance to finish off the Invincible Manjiro and try to get to him. Ken and Takemichi try to save Manjiro, but they're too far away. But then, a rather surprising person came to Manjiro's aid.

Two years ago, Manjiro learns that Kazutora is beefing with the motorcycle gang, the Black Dragons, and decides he'd fight them as well. But he wanted a valid sense of purpose to take on a motorcycle gang. Keisuke then suggests they make their own motorcycle gang. They want to create a gang where they can all put their lives down on the line for each other. Keisuke had been fighting all alone to protect the promise they made the day they created their gang and put their money together to buy a traffic safety charm.