The Reborn Top Killer Does Not Need a System

[No heroine + heartthrob + system + campus + battle] Yan Yu is the only heir to Yan Qing, the overlord of H country and the leader of the Jianglong Gang. Ever since he could remember, his father had instilled killer theories under the most stringent standards and received systematic training in combat, assassination and intelligence. With talent and ruthlessness that far exceed those of his peers, every mission he performs ends perfectly with zero error, making him the sharpest and most feared weapon in the Jianglong Gang. It was by relying on Yan Yu's "ace card" to clear out all hostile forces that the Jianglong Gang finally secured its No. 1 Position in the underground world of Country H. After his success, his father Yanqing gave him a rare long vacation, allowing him to temporarily escape from the bloody life. But no one expected that this top killer, who had never failed in the battle between swords and swords, would inadvertently take a bath for too long because he was new to ordinary bathing, and eventually died accidentally due to lack of oxygen. When he opened his eyes again, Yan Yu found that he was reborn in the body of a junior high school student "Yan Shiyu". What shocked him even more was that the original owner of this body had become the target of school bullying precisely because of his charming appearance and flamboyant temperament. At this moment, the gangsters were grinning ferociously around him, and one of them even poured cold mineral water directly on his chest, causing his wet clothes to cling tightly to his skin. Immediately afterwards, he reached out to take off his clothes. At this moment, a cold mechanical sound suddenly sounded in his mind—— [Ding! The campus dominance system has been activated! (The contract has been signed and the title of the book cannot be changed, but in fact it should not be considered a rebirth)