This series is very "what you see is what you get"; the male protag has amnesia, is an arsehole to the token girl of the series yet puts up with her regardless, and as the story progresses a harem is shoehorned in there somewhere. I'm one of those weirdos who gets invested in the world a series is set in, so I tend to appreciate it more when an author invests effort into world building. Sadly I don't get a whole lot of that with this; concepts are introduced, but that's established as nature of the world and the people around the main character and that'sthat. And characters don't very deep as far as character development goes.

But overall it's a fun little read, and the art is really cute.
Izumi is exceedingly adorable.