In this story, Izuku has technically speaking, two fathers. His mother is still Inko though. He has two older brothers, Hawks and Tenko/Tomura. Though, he only knows about one. As of right now, his met neither of his brothers and he hopes to find them. Mina, Kami, Shin, Bakugou, Ochako, and Iida all grew up together.
They've all met Eraserhead at LEAST once, after they met him once though, they never heard from him again. This is a chatfic, AiDeku, BrotherHawks, BrotherTenko, DadForThree(he considers Hawks his son), QuirkIzuku, SecretKeepingIzuku, ShinTodo, HawksBaku, MinOcha, MomoJiro, IidaSero, TokoTsu, DabiShiga.
Midoriya Twins AU
Izuku is neglected and mentally abused by Inko and their stepdad Toshinori because they feel his quirk is weak compared to his twins. Izuku now rarely speaks and can't express/feel basic emotions. The only people he cares for is his twin brother Izuki and his bestfriend Katsuki. Katsuki convinces Izuku to go to UA with them. As the three of them start training they realize Izuku's quirks are stronger than they thought.
The twins are finally saved and given a loving home but things aren't as they seem. With these boys come dark secrets that are better left buried. Danger and death follow them like a plague and soon everyone around them falls, victim.
Will these deadly siblings finally get the happiness they yearned for or will their story take a dark turn?