Honey's younger brother, Yasuchika, visits Ouran High School, and the two immediately come to blows. It's a Haninozuka family dictate that whenever any two of its members meet they must fight, thereby sharpening and improving their unique family-developed martial art style. The two siblings used to get along until Honey's late night behavior gave 'Chika' reason to believe his brother was no longer of this earth. Written by
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He's always being compared to Honey senpai, so that's why he feels such animosity towards him. His older brother is more attractive, more popular, and a better martial artist than he is, I think he's just letting his jealousy get the best of him.