I watched this maybe a year or so ago, and I hardly remember a single thing about it. That should be all you need to know. It's not memorable. There's no substance. A good anime will have memorable plot points, characters, etc. This anime has nothing. It's a filler while you wait for other shows to come out.
It does shake up the Isekai trope somewhat, wherein the whole "transported to another world and figuring out what the hell is going on" arc is nearly entirely absent. The character has been in the alternate world for 300 years (shocker), and is blatantly overpowered with weak allies. Go figure. They try to draw away from their lack of substance with fan service and it does not work on anyone out of their prepubescent age.
However, it's not BORING, it is somewhat entertaining to have on in the background (dubbed) while you're doing something else.
This is a skip. If you're looking for something to get attached to.
