A few months before, while all of this was happening, It was the Midoriya twins birthday and the family had gone out with the Bakugo and Todoroki Family. When they were in the restaurant, Touya (he is a pro hero in this world, No.10 Hero FireStorm→ same powers as Firestorm from DC[mutated quirk]) asked, "Hey where is Izuku-kun? Its been awhile since i have seen him." "Yeah, where is he?" Fuyumi asked. At that moment Inko and Hishashi remembered Izuku for the first time in years and stuttered as they said, "He's at home, he's sick so he didn't want to come today." Touya, who had gone undercover as a villain before and was trained under detectives, immediately knew something was wrong. "Your Lying" He said. Enji, Rei, Mitsuki and Masaru looked at him. "They are sweating and stuttering, the tell-tale signs of lying." Touya elaborated.
"Obviously they lied," Katsuki said, smirking. All of them except the kids and the Midoriya looked at him. "I mean they neglected their kid so much that they actually forgot he existed. No wonder that Demon was depressed at school the past years." Katsuki told them. Enji and Masaru stood up and looked at them in fury. "Natsuo, you know something about him don't you." Touya asked Natsuo, his younger brother who was awfully silent. Natsuo told them the full story, about how the 5 children abused and bullied him at school and how he never eats at home. He also told them Izuku worked to get his own food and only ate once a week. He also told them Izuku made him promise not to tell anyone unless they ask. And that he had disappeared 2 weeks ago.
By the time Natsuo finished, Rei and Mitsuki were crying in thought of Izuku, who they cared about as if he was their own son. Enji, Masaru and Touya were furious and were upset at the 5 children. All 5 of them except Katsuki faced down in shame. Katsuki however laughed, "Well that villain is dead now!" Masaru, who was usually calm all the time, lost his calm and slapped Katsuki across the face, an act which shocked everyone. Masaru never got angry at anything and he must have been angry enough to lose his cool. "Shut up Katsuki Bakugou. He was no villain. You are HIS VILLAIN!" He shouted at him. Realization hit Katsuki like a twenty-pound sledge hammer as he realized he was actually in the wrong and started to regret his action. All of them left and went to the Midoriya Household and went to check Izuku's room. It was mostly the way it was. Nothing. And all of his clothes and notebooks he wrote were gone.
There was only a letter on the bed. Rei took the letter and started reading it aloud. "Dear Family, Wow you guys actually remembered me in 5 years. I couldn't take it anymore. I'm sorry. I was neglected and bullied for something I could not control. By the time you find this letter, this demon would be far away, or…" She stopped reading,sobbing and tears flowing uncontrollably. Touya took the paper and continued " … be dead in some random place. After all, isn't that what all of you wanted? Thank you for giving birth to me Mother, and letting me be neglected. Thank you for your upraising father, and letting me be forgotten. Thank you for your support Izura, for giving me these wounds. Yours sincerely, Izuku Midoriya Deku."
"YOU BASTARDS!" Enji roared with fury and the 3 families searched for Izuku for 2 weeks. When nothing resulted, he was presumed dead and the families were in grief. The Midoriya family were filled with guilt at losing a very precious member of the family and the kids who bullied him swore to become a hero in memory of him. Little did they know, He was very much alive.