Toshinori Yagi or better known as all might just returned after being the number 1 hero in America to be the number 1 hero in Japan as the symbol of peace, due to how popular he was in America, he saw his wife inko midoriya also known as the number #5 hero green psyk was waiting for him at the airport as she asked why he returned so early from America,
he explained it was to get revenge on the man who killed his master nana shimura who had entrusted him with his quirk, One for all, a quirk that stockpiled energy from generation to generation as after a year or so later he found out that his wife was pregnant, toshinori was excited to say the least, but he knew he had enemies, enemies who might use his family as a vendetta against him as he and his wife decided to keep their heroic identity from their children until they were ready to learn the truth,
From now on I'll be refreshing to all might as toshinori when he is not in his buff form-
9 months later:-
Toshinori was resting on the couch as he had been for these 9 months as he was scared since his wife inko was having constant mood swing during her pregnancy, as it was better to deal with a villain than a emotional demon, just then inko burst out from her room as all might was thrusted awake "Toshi I think my water's broke" toshinori jolted up from his seat as was sweating buckets as he jolted up, got in the car, and drove to the nearest hospital in crazed frenzy
One day later-
All might was impatiently waiting outside the operation room as he was finally called to see his wife inko as he saw that there was 1 baby boy there as he rushed to his wife's side to hold it as the baby as he saw the baby had black hair, toshinori was confused at first about the boy but the doctor explained it may had happened due to inko's family line or her ancestry DNA as her brother aizawa had black hair as well, toshinori was happy as tears started to fall from his eyes as inko comforted him
Toshinori turned to his wife to ask what they would name their first child as both of them decided to the boy izuku yagi-
After a year inko was pregnant with izaki as in this fic deku is a year older than izaki