
I don't read anything harem or ecchi. This is one of my personal favourites because it has a proper plot, the MC has a proper purpose for getting stronger, it shows his hard work and cultivation/growth (rather than it being or seeming like a no-effort cheat), and he's neither a pushover beta nor arrogant snot MC.

Oh good!
You might also like:
http://www.mangago.zone/read-manga/chronicles_of_heavenly_demon/
The MC ends up reborn on the demonic side of things and is less pure-hearted than Volcanic Age's MC, but, personally, I find the story style/feel is similar and I like it almost as much. So, it might be worth a try (if you haven't already).
Wanna give this a try so anyone can tell me whether it's harem or mc has bitch personality or not since I am not good with them.