The sidestory is longer then season 2... Could be a season 3, to be honest.

FRRR

The side stories could use side stories the way we end up with an open ending on lee won dealing with his target er

The series ended quite a bit ago, but I'm prettu sure back then it was decided that the side stories, are volume 2 (or "season 2") of the novels, however the manhwa team just decided to make them into "side stories".

I might be wrong on that- but just know there are a good few more chapters left to go.