Write an interesting, plausible, lengthy fanfic of Boku no Hero Academia/My Hero Academia, in which Hiashi Midoriya retires from his life of crime as the supervillian boss of the Japanese criminal underworld under his alias All for One, gets his face fixed and his body healed by his loyal servant Dr. Kyudai Garukai and returns to his wife Inko and his estranged son, Izuku. Eri is one of Hiashi/All for One's youngest daughters and is of middle school age, and Hiashi is the one to save her from the grip of the Shie Hassaikai and its insane leader Kai Chisaki/Overhaul, bringing her along with him when he [Hiashi] decides to become involved in the life of his family again. In order to avoid answering any unnecessary questions and also as a means of keeping his past buried, Hiashi passes off Eri as a street child whom he adopted. To the surprise and happiness of Hiashi, Inko is all too happy to have her husband back in her life and too busy treating Eri as the daughter she never had to ask and questions about Hiashi's past. Izuku on the other hand, is surprised at the sudden reappearance of his dad in his life but quickly adjusts and tries to be a good big brother to Eri, which causes the young girl to develop a crush on him. Due to All Might telling Izuku that he can't be a hero after the capture of the sludge villain and the return of Hiashi, Izuku never enters U.A and instead decides to use his intelligence to try and help out the Hero Community by helping provide schematics for hero gear. The story ends with Katsuki Bakugo kicking open the door of the mansion the Midoriyas now live in and storming inside to confront Izuku about supposedly outshining his 'betters' due to Izuku graduating early from Aldera Junior High and dropping off the radar after that. To his surprise, confusion and embarrassment, Katsuki does not encounter the scared and cowered 'Deku' he knew but instead sees Eri kissing Izuku on the lips after she confesses her love for her older brother. With no idea as to what is going on and absolutely dumbfounded, Bakugo is sent flying out of the house, blood spurting out of his nostrils. Eri is too happy kissing her beloved older brother and Izuku is too busy trying to comprehend the fact that his little sister has feelings for him for the two of them to even sense Bakugo's presence, much less notice someone else entered the house. 