Juni Taisen: Zodiac War

In Like a Dragon, Out Like a Snake, Part 1 (1x7)

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The warrior of the snake, the Tatsumi brothers, and the younger brother are dangerous people who profess to have been arsonists if they were not warriors. The condemned brothers, who are absolutely confident in the combination of twins, used to "play" to test their strength when they were boys. The condemned brother / brother remembers being helped by his brother in the final "play" that day when he learned that one of them was destined to die after participating in the Twelve Wars. Now, in front of him who has arrived at the venue of the Twelve Wars, a rabbit warrior, Usagi, appears and proposes to become a "friend".