@Galder the author made so that is intereting that way, MC could easily resolve most situations before they started just with his speed but that wouldn't be interesting for him + he acts like he knows all but really doesn't, the organization girls think he knows everything but he is bullshitting most of the time, add to that how he believes the girls built on his story of the demon sect and then want to see what story they wrote based on it.
Sometime he doesn't move just because he is curious, is hard to understand what he believes to be fake and real at times.
@Theatricality yeah, even just the WN is a better way to go, explains things more and doesn't skip parts, it helps understanding how some character really are from their thoughts
but I think the Light Novel got released in the west and that should have a polished story, another good way to go