Honey has a younger brother named Yasuchika "Chika" Haninozuka. Chika is known to hold a grudge against Honey because of Honey's loli-shota lifestyle. Whenever they meet, family tradition demands a martial arts duel and, typically, Honey wins. Chika demands that Honey steer clear of him at school. After he leaves, Haruhi learns how Honey quit being the Captain of the Ouran Karate Club in order to join the Host Club. Tamaki insists that they help the brothers reunite and so, they go to the dojo where Chika is now Captain of the Karate Club. Chika confronts them outside and calls his brother an "alien" because Honey eats three whole cakes for dessert every night and holds a weekly midnight cakefest; this, without ever gaining weight. Honey apologizes to Chika for causing so much pain and suffering for him, but won't give up being true to himself. To settle the score, Honey and Chika have a martial arts duel, the stakes being that if Honey loses he will give up his weekly midnight cakefest. Mori is confident Honey will throw the fight for his brother but is devastated when Honey beats his brother soundly. In the end, Honey considers Haruhi's opinion that if he loves cake more than his brother, he's really a terrible person; and also Tamaki's opinion that true strength means being true to yourself. Honey's response is to hug Usa-chan tightly saying, "I love you."
This episode provides examples of:
- Adaptational Personality Change:
- Honey’s behavior with Chika is less affectionate and less supportive of his brother’s fighting style. In the manga, Honey was concerned when Chika was attacked by Satoshi, Mori’s younger brother, and he offered praise and pointers for how his brother could improve his fighting.
- After his fight with Honey in the manga, Chika showed signs of being similar to his older brother. This does not carry over, which makes him cold and indifferent in the anime.
- Berserk Button: Chika gets riled up whenever someone compares him to his brother. He even forces his students to keep training despite them being on a break.
- Comically Missing the Point: After Chika explains why he’s put off by his older brother, Honey believes that it’s because of his constant consumption of sweets.
- Offscreen Moment of Awesome: Honey managed to beat up his larger and stronger father when he was fifteen years old. While none of the action is shown, it does cut to Honey’s father in full body cast.
- Unusually Uninteresting Sight: All except for Haruhi are unfazed by Honey and Chika starting a fight upon meeting. This is because it’s tradition for the Haninozuka family members to battle upon meeting each other.
