This story was actually a decent read, sadly it got axed. At the start I thought it'll be another generic betrayal plot where he gets a harem and becomes OP for free, but no there was genuine thought put into this. Yeah he does become OP but it wasn't just given to him for free, he was working hard day and night to the point the skins on hands was ripping apart, also it's not a type of power he can recklessly use whenever he wants to either. He doesn't get a harem in 3 chapters, instead there was a slow build up focused on 1 girl only. Not to mention his bully getting character development, understanding the error of his ways and instead of being jealous, he wanted to befriend the MC and stayed away from his toxic friends.
If you don't see my comments for a while, I'm letting the manga/manhwa cook more chapters.