Naruto: Kakashi's Younger Brother, with the Glint-Glint Fruit from the Start

[Hokage Fanfiction + System + Devil Fruits + Prankster + Invincible Power Fantasy + Multiple Heroines + No Getting Pushed Around] Transmigrated as Kakashi's twin brother, Hatake Sora faces a hellish start: his father is about to take his own life, and his big brother will turn dark in the future. To make matters worse, he's completely unable to use chakra, and the whole village mocks him as a weakling who couldn't win a fight. Fortunately, he awakens the “Ultimate Prankster Devil System” and fuses with the [Glint-Glint Fruit] from the start, with no side effects! Can't perform hand signs? No chakra? Sorry, I'll just exorcise you with brute force! And so, Konoha's entire way of life falls apart. Anko: “Hatake Sora, you pervert! You use your light-speed movement just to flip up my skirt?” Danzo: “Stop him! He's turned the Root Base into a nightclub with that blinding light. I'm going blind!” Madara: “Speed is weight? Damn it, he kicked my Perfect Susanoo to pieces!” As everyone falls apart, Sora wears tinted sunglasses and keeps his hands in his pockets. “How scary~ Have any of you ever been kicked at the speed of light?” This is a new Konoha legend with no angst or bitterness, just a supreme prankster crushing everyone from another dimension. Kakashi: “My little brother's great in every way. He's just way too much of a flirt.”