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Anime: JoJo's Bizarre Adventure Part 4: Diamond Is Unbreakable
ジョジョの奇妙な冒険 ダイヤモンドは砕けない
Episode 15: As Josuke beats Rohan to a pulp, Koichi explains that when Josuke came down with a fever when he was four years old, it was a student with a regent hairstyle who helped him and his mother get to a hospital in the middle of a blizzard, inspiring Josuke to copy his hairstyle and take offense to anyone who insults it.