It's a really good story, like others reviews mentioned it has a reaaally long startup, with the plot beginning in chapter 70 :P, but this start isn't bad or boring, quite the opposite actually. I guarantee that it's worth reading it. The mc gets a really interesting power that gives the author a lot of freedom and, so far, he's using this perk really well.
Also, the author seems to has chosen a more "realistic" approach in regards of relationships (that means you probably won't see the mc trying to go for a girl just because she is beautiful. It's still a harem story though, don't get me wrong on that, the characters seems to have a more "realistic" viewpoint regarding love, specially when you take in to account their age, but the world still is DxD).
The relations fells really natural up to this point, I love seeing how the mc is interacting with the girls and I am quite thrilled to see more of these moments.
The major flaw of the author is that for some reason or another he has a unstable update frequency (meus pesames pela sua gata btw ;-;), but it's not that big deal. Another point to make is that there are a few spelling mistakes here and there, but since English isn't the author's main language, he is Brazilian, so that isn't unexpected.
Enfim, agora que ja falei o geral... Pros brasileiros do site... Voces vao ter a chance de ver a Rias comendo baio de dois e farofa... KSKSKSKSKS eu ri tanto naquela cena, pelo amor de deus ksksksksksks