If I were to overanalyze the dungeon design I would guess it's meant to get rid of the adventurer's magic items in a way that just makes them think the creator is a pervert before the later floors are filled with actually dangerous stuff
Edit: My bad, it has a harem tag in manga updates so he's probably gonna end up with the succubus,demon lord,(although I'm not sure,but cat Loli definitely have a chance)