After Becoming Kusuo Saiki

To defeat Kusuo, his older brother Kusuke designed a game called Brother System. While repairing Kusuo's suppressor, he secretly installed the System program in it. Kusuke was certain that after the two of them reincarnated in another world, he, as the older brother, would finally defeat Kusuo. Who could have guessed that Kusuo would discover his brother's scheme and use his psychic powers, yet still fail to escape the System in time? Kusuke, who hadn't entered the System, burst into tears. "I don't want Kusuo to become someone else's little brother!!!!" [Jujutsu Kaisen Arc] The Gojo family has a pink-haired kid. The clan elders, suspecting the matriarch of having an affair, are busy covering up the scandal. They don't even have time to pay attention to the once-in-a-century Six Eyes prodigy. So the four-year-old 5t5, who's particularly annoying, grabs Kusuo by the face again. With sky-blue eyes, he says disdainfully, "My little brother is so weak..." Gojo Kusuo teleports away. See you never. [Demon Slayer Arc] For years, Kokushibo has been consumed by jealousy as his younger brother, Yoriichi Tsugikuni, outshines him in talent. Then their third brother, Kusuo Tsugikuni, appears. Kokushibo stops feeling jealous. Instead, he falls into... deep despair. [Reader's Guide:] 1. Lots of liberties have been taken. Please don't nitpick. If that's not your thing, don't read. If you enjoy this story, feel free to visit the author's page and add the sequel to your collection in advance: After Becoming Gojo Kusuo [Part Two] Theme: Family, friendship, and love: you need them all!