As Izuku was considered quirkless he has been abused and neglected by friends and family one of his best friend ended their friendship due to him being quirkless and his now ex girlfriend broke up with him with the same reason as he went home he got put out due to a lie of breaking friendships and cheating which he clearly didn't do and now he is by himself and ran into a person named Guy. As Guy heard Izuku story he took him as a father to him and trained him for the Bunshin style.
Ship:
Izuku x MomoMomo is gonna be saved by Izuku and her affectionate for Izuku has grown more and more.