In Harry Potter With Instant Mastery

I DO NOT OWN ANY OF THE CHARACTERS EXCEPT FOR THE OC'S This is a wish fulfilment fanfiction, be warned, if you don't like fast growing mc's, this novel is not for you. The mc will grow stronger quickly in the first couple of chapters, but will slowly down during the middle and end of every universe he goes to (this is a multiverse story). This is not wuxia novel where there's a face slap at every turn, but there will be some all the same. I will try to add some romance, but don't get your hopes up. THIS IS NOT A HAREM FF! I take kindly to constructive criticism, but not to people that want something and expect me to absolutely follow their instructions. This is my first novel, please take care of me