Tale of a Man who was reincarnated into another world as the son of a Saint but his birth was hated by everyone and he was forced to get a class that was seen as an unwanted class, Alchemist. Using his previous world's memories and his wisdom, he was struggling to survive and gained a stable life. Disclaimer: I don't have the picture on the cover

You are todorokis younger brother and everyone likes you because you are cute and small This is a male reader x BNHA