I'm looking for reincarnation/transmigration fantasy novels that're kinda like Mushoku Tensei, with the mc training to become really strong as a child,(and maybe a academy arc at some point) but without the harem. -isekai/fantasy novel -strong mc (preferably male) -NO HAREM -has some comedy -maybe romantic subplot (but no harem) -longer than 50 chapters -mc isn't a dunce with a hollow head
Maybe Beginning After the End? I believe it meets all your criteria unless something changed in the latter half of the story since I have only read the first half.