Koukou is a Slash ship between Kouji and Kouichi in the Digimon Frontier series.


They were brothers separated when very young. Kouichi finds out about Kouji and goes to look for him. He ends up in the Digital World and is corrupted by Cherubimon. After learning of Kouji again Cherubimon turns his resentment of Kouji and his father against him and he attacks Kouji. Once Kouichi is freed he regrets what he did and they become friends.


Koukou is a fairly popular slash pairing in Digimon Frontier.


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