Regarding the incest:
It's pretty complicated, long story short. I've read all of the translated parts that were out on Baka-Tsuki so far. There's a mixture of maturity and comedy. Some aspects of this setting are similar to FSN (in terms of what magicians do).
Overall it's a decent read, but I think about 10% of all of the combined pages of the entire series thus far (perhaps an understatement or an overstatement) were spent talking about how fucking awesome the MC is. I mean yes author. I know you made him amazing. Just shut up, please. I don't need you to point out how cool he is like you're one of those generic sideshow characters standing on the side going "oh my god, he's doing this?!". And by the way that's not including how much the sideshow characters themselves actually do it. The series also gets caught up in its own techno-babble a decent portion of the time. You'll find five to ten pages or so wasted of him sitting there discussing how this works within the magic framework he set up (or she, I never looked at who the author was). I didn't read this to read complex theories about your make-believe rules of magic.
I mean you really can't expect anything amazing out of it in the first place since it's still somewhat trying to adhere to a school setting (a plague)... but as far as these types go, it's not bad. I can also imagine this wouldn't be terribly difficult to turn into an anime if they just cut out all of the junk.