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Genma just wants a relationship. Really, at this point any will do. Kotetsu, Izumo, and Iruka are simply not having it. Anyone who wants to get their grubby paws on Genma is going to have to go through them first. (Let it also be said that Kakashi is definitely not above cheating when something he wants is on the line.)
An alternate, somewhat slapstick coda to Fallen here to grace.