My Hero Academia, or one version if it anyway.

Once they were ready, Jett was setting up something on his smart phone. "What are you doing?" Esther asked, now with the appearance of a moderately curvaceous girl with long grey hair, blue eyes, and wearing a cute black dress with an opening above her cleavage and light blue lines in a few places.

"Looking at and updating the list of universes and versions of them we are going to visit," he told her.

"Versions of them?"

"...I told you about this before, didn't I?" he raised an eyebrow.

"...I think I was a little busy sucking your dick at the time," she huffed.

https://images2.imgbox.com/66/87/2DOIbQoP_o.jpg

"Right. Well, the multiverse is mind bogglingly vast, like, even if I had a million years to do nothing but go from one universe to another, I still would have done about as much as take a drop of water from the ocean, comparatively. If that. There's literally a universe for every story ever written, every fanfiction of it, and of stories that have yet to be conceived and their fanfictions, or that never will be written, or even dreamt up. Literally any kind of universe is possible in the vast fabric of the multiverse, and if it's possible, it exists.

"If I open a portal to another universe, then I have to envision what kind of place I want to go to as I enter it, otherwise, it just takes me somewhere random. I don't even want to talk about the time I ended up in something dreamt up by someone called H.P Lovecraft, I barely got out of that one ALIVE, let alone sane.

"I'm looking at the entry for a world similar to ours, where people all around the globe there have special powers, called Quirks. I was in a version of that universe, and I'm picking which girls we are going to want. Then I'm going to envision a version of it that's exactly the same, except the girls we pick are all 18 or older, not old hags, and have a deeply buried desire to be mind controlled into a harem already, then we'll go there."

"Ah, that makes sense," Esther nodded, glad he thought all this out.