The hot chicks look like a harem. They are not a harem. The MC looks like a loser-kun. He is an educational ninja. The mean girls look evil. The ... well, yeah, they are pretty bad, but they have their own issues, so there's that. What I'm trying to get at is that this manga is a trope-buster. Just about everything is flipped from what you'd expect. And that is a very good thing. The MC is a plain-looking self-proclaimed virgin and that set's the table for the biggest expectation subversion. As you read on, you find he is actually a smart, crafty professional. He isalso stoic and distant to the point that it's almost impossible to root for him. Instead, you just want to see he's going to handle the next hurdle. So far, he has yet to fail.

The genre appears to be a mystery-thriller, with a little bit of high-school character-building thrown in for sauce. I read the first 18 chapters in one sitting and I'll be monitoring for the next. This is interesting.