Late Review as I saw it randomly updated and figured I should say something? This is a very simple series yet somehow it's not Isekai. Just a regular school boy whose room becomes a portal to a fantasy world. He meets a couple of other worlder girls who he teams up with to adventure, not as exciting as most would assume There isn't really much going on here, just slice of life interactions with a touch of fantasy stuff. I mean there is also a bunch of Ecchi stuff so maybe it's nice to have, as the story is just on a medium scale