Better than I had expected
MC is a weird guy, he's aloof to a weird extent, he's almost not emotionally involved with anything going on except his own hurdles, maybe it's based on him not being able to see this world as real since it's his creation. Also, he uses his knowledge of the world ALL the time, literally, which should be the norm in this kind of story but it normally isn't, most of the time it's used at the start and every once in a while as a plot tool. Last, he's pretty fallible, quite often, he acts on his knowledge without thinking things through which has interesting ramifications beyond the "Ooops" moment.
Storywise, it's a very tried setting, sure, it's more used in shoujo stories, but there are still quite a few seinen stories too. So far (21chs) it's well presented and the plots are well presented and interesting, is undoubtly too soon to say anything here, but so far, leaving aside the expected lack of originality it's good.
Secondary chars have had little "screen-time" so there ain't much to tell, but they have been engaging at least and not too stereotypical.
Art is great, pace is good and dialogues are rather simple.
Overall, an enjoyable story so far, we'll have to wait to see were it goes from here and if it survives the 100ch hurdle. I wonder why the first version was dropped.