Just one girl after another, the mangaka doesn't know how to take it slow. He's just introducing new girls right and left, while barely building them up as characters after their introduction. This entire manga is like some otaku's fever dream of a manga, where the main character is OP, has all kinds of dream girls (even his mother is hot to boot), is edgy as fuck and "cool," affluent and powerful socially, super intelligent and excels in everything, etc. And it really fucking shows, because the story and pacing is wild. Most of the characters don't have much character building, we're just introducing one character after another while MC is just continuously growing rapidly.
edit: holy shit, I didn't know this was the same author for Maou-sama no Machizukuri! and Shijou Saikyou Orc-san. Just further goes to show this is what the author likes.