Twins of Duality

Everyone knows the story of how Izuku Midoriya became the worlds number one Pro-Hero. But, what if Izuku secretly had a identical twin brother? What if Izuku's father was none other than Hisashi Midoriya, A.K.A. the number one villain All For One? What if All Might was truly a hero possessed by a Villian? What if his mother, Inko Midoriya, was the retired, psychic, former number four pro-hero Gemini? What if his father was actually framed thus becoming the number one villian? What if the SCP Foundation was present?
Enter the life of Nichuri "Demaku" Midoriya. Son of All For One and user of the AFO quirk. After being separated from his twin brother Izuku ever since him and his brother were 3 years old, Nichuri has dreamed of stopping the villain known as Tyrant. Tyrant had been possessing All Might's body, using the pro hero's power to kill 10,000 people in four days and framing Hisashi afterwards, thus forcing Inko and Hisashi to split up and take one of their children with them. Nichuri watched as Tyrant, posing as All Might, passed One For All to his brother and trained him to become a hero in order to use Izuku as a weapon against his father. Now that Izuku is going to UA, Nichuri uses the L.O.V.'s attack on the USJ to reconnect with his brother as well as attempt to defeat Tyrant in his stolen body. Afterwards, he begins to visit Izuku whenever he can in order to test how strong he is while also trying to reunite with his twin. But with the Pro Heroes against as well as his own brother fighting alongside them, his reunion is easier said than done. Will Nichuri be able to show Izuku the truth? Will the twins be able to defeat Tyrant and clear their father's name? Can Nichuri and Izuku find a way to both love a certain roundheaded female in Izuku's class even though Nichuri is known as a villian?

All For One son/Midoriya Twins/ Pro Hero Inko/ Evil All Might AU/ SCP-999-2 "Rese" (Ultimate Pacifist/Ultimate Combatant) Breakout AU
PS: cover art doesn't belong to me.