sick of hearing the people of konoha calling him a demon, naruto decides to summon an actual one
so, the idea started with harry potter summoning a demon (possibly meliodas, maybe a fate servant) and they go to hogwarts together as wizard and familiar(after killing/dealing with the durslays). the new idea is naruto summoning a demon as payback for all the c*ap the vilage put him through and the demon (meliodas) ends up possessing naruto, maybe make the demon a reincarnator with meliodas' powers instead of og meliodas, as og meliodas will only want to go back home to stay with elizabeth and that is boring