Responses
They live in the same world setting. They even had a big fight in chapter 0.
Idek if crossover would even be the correct term since to have a crossover the stories have to be of discrete fictional characters, settings and/or universes. Necromancer... and Terminal ill.. both exist in each other world
This is basically what this world would've been without the intervention of Terminally ill MC
Waaait lord reinhafer "problem child"?!??! Is this a cross over between this and the terminally ill?!?!