Methinks the author wanted to do a multi-plot convergence with an ability to parody and mock as many tropes and cliches as possible.
Honestly? I'm all for it. Though I gotta agree that it can get chaotic and messy.
So the villain can pick and choose which plotline to slip into, and mobMC went TL;DR on him. Kek.
Huh, the black and white cutout is just an extra 2D girl. I was thinking it could be villain's delaying tactic, guess not.