It's a BL novel, in the cover there's a man that have a big body with something like karate suites? And if I remember correctly the desc is about the MC that has a big body but want to be the bottom, but others thought that he is the top Anyone remember?
Sorry, I can't think of anything, but I think you might get more results tagging this under 'forgotten title'.
I searched around and I think it may be "A Good Wife" by LAmerica06 on Wattpad? The cover has been changed but the description matches
Does he want to be the president of the Martial alliance? At the beginning of the story he joined a school on the dao