Izuku the son of black dynamite and Inko but he's father had to leave because of the dangerous people that will go after him to protect Inko and izuku he had to leave till Inko married all might then izuku became a big brother to izumi and it was time for quirk results izumi get a telekinetic quirk while izuku was known as quirkless so Inko and toshinori praised izumi while izuku just in sadness and anger that his own mother betrayert him that fast izuku found a phone number in his ex parents room that says
Black dynamite (Izuku father)
As izuku called the phone number and here's his dad and told him that he's Inko son and what's just happen as dynamite told izuku to wait for him at the airport and he will take care for him so after getting izuku he trains with his father to defend himself and gets ladies panties to drop