What would happen if Naruto had an ABO world setting? The male lead, Namikaze Kagami, transmigrates. He's an Alpha and the adopted son of the Fourth Hokage and Kushina, a half-Jinchūriki, and two years younger than Uchiha Itachi. My headcanon is that he's the second reincarnation of Asura. In this life, Asura's and Indra's chakra have been split into two, and only one reincarnation can survive. Indra's other reincarnation is a female Alpha, an original character: Uchiha Rin (in the other spin-off). Pairing: Obito Uchiha. He isn't a good person. He only wanted to protect the village, but was bound by his parents' last wishes. The boy who used to shout that he wanted to be his Omega has drifted further and further away. He can't keep trying to hold him back and persuade him, the way Naruto Uzumaki does. All he can do is keep drifting farther away from him. At the very last moment, he pushes him out of the darkness, while falling into an abyss himself. In the end, he will leave the stage. The boy tries to grab his hand, and as he runs, he hears him crying out. He says, "You're really as annoying as Uchiha Itachi."
"I won't forgive you."
---After the Fourth Shinobi World War, Sasuke Uchiha rejects Sakura Haruno's confession. He doesn't know why. He should fulfill Uchiha Itachi's expectations for him: get married, have children, and be a virtuous Omega. But he feels deeply resistant to the idea, and keeps sensing that he's forgotten something. During his long journey of atonement, he passes a red-haired man wearing a conical hat. He takes his hand and kisses his fingertips.
"You don't have to forgive me, but I'll always love you."