Chapter 80

"Thicker than water is the first chapter of the 10th volume and the 80th chapter overall of the Tokyo卍Revengers manga series, written and illustrated by Ken Wakui.

Summary
As Takemichi coughs from being knocked over, the Black Dragons bow for Taiju, who says he wants to join the fun. Taiju continues to beat up Takemichi, then asks who he is. When he learns of Takemichi's status as Toman's First Division Captain, he laughs in disbelief that Hakkai brought a Toman member to their home, but refuses to join the Black Dragons.

Taiju orders Hakkai to beat Takemichi to death, while Hakkai begs for his brother to show mercy towards Takemichi. Takemichi notes that Hakkai's disposition has changed in the presence of his brother, as he is now terrified. Taiju tells Hakkai that their relationship as brothers takes priority over relationships within Toman, causing Yuzuha to confront Taiju, telling him not to corner Hakkai. In response, Taiju punches her, blaming her lack of discipline towards Hakkai and warning her that he will deal with her later. Takemichi admonishes Taiju for hitting a girl.

Taiju responds by telling Takemichi to stay out of his family's business and prepares to beat Takemichi to death in front of Hakkai. Hina wants to protect Takemichi, but Yuzuha stops her, warning Hina that Taiju will not show her any mercy. To get his brother to stop, Hakkai is forced to say that he will quit Toman and join the Black Dragon.

When Takemichi awakes from unconsciousness, he is being carried on Hakkai's back, with Hina at his side. Takemichi apologizes for forcing Hakkai to leave Toman, but Hakkai says that he had already decided to leave a while ago and thanks Takemichi for standing up for Yuzuha. As Hakkai says that there is something he has to do within the Black Dragon, Takemichi suddenly remembers what the future Kazutora told him about Hakkai: he would kill his brother for money, then take over the Black Dragon.