I would like to suggest Ex Rank Supporting Role’s Replay in a Prestigious School, it’s really good! But I haven’t read it for a while cause my brain’s roasted by mtl TT

Also, Lord of the Mysteries has a second series called Circle of Inevitability, the mc is different and the focus of the overall story is different, but this story really grew on me as well XDD

 Hope this helps, and I’ll continue on my hunt for new series to read