Mushoku-tensei ~Isekai ittara honki dasu~

First of all, is it pervy? Off course it is, it's an anime, and it's 40 year old guy in a boys body, everything he does will be questionable, but compared to basically 80% of other animes it isn't even that bad. If you can get over that, than its an anime that actually has some depth that this genre never has, it doesn't rush the plot, the mc doesn't always make the right choice and is far from perfect but doesn't annoy you because you understand his thought process.

So if you're sensitive don't watch it, if you're used to most animes I would highly recommend it.