Gaiden
A side story or spinoff of a book or game. It’s not a prequel or sequel. It’s just a random story told from someone else’s point of view or a flashback that makes no sense.
That gaiden was just a dumb story about the guy’s brother. Who cares?
I read the gaiden and it was just a flashback. What’s the point?
Why is this gaiden here? It’s just a random side story that no one asked for.