Bruh, they really lucked out with this one. They had the most close calls in the series in this one arc. Personally I think the hentai protagonist guy is gonna turn into a mutant zombie and is then gonna try to NTR the mc.
Looks like the Mc and the girls are in trouble! I only see three ways out of this:
1. He gets the gyaru cops to become allies
2. Something unexpected like a mutated zombie comes out
3. The dark skin gyaru suddenly gets stronger
Unlikely, the artist basically said it wasn't about to end soon and it sells well so it probably isn't getting axed. But you guys are right in a sense, the series does feel like it's entering its final saga.