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A young man named Xing Zuo Gu Xia. 18 Years old. He is a newbie who has just become a killer. It will be led by Sora Amamiya, who is seventh on the killer list. Kasumi is responsible for injecting poison into targets, and Sora is good at guns and has a very smart mind. Sora is 18 years old. During a mission, Kasumi accidentally injected poison into Sora's body. Sora lost his memory and turned into a 12-year-old child, but in a daze. As the two failed in their mission, Kasumi fled with Sora in search of an antidote. Kasumi changed her name to Yukizawa Nian, and Sora pretended to be his younger brother, Yukizawa Yuki. In the end, Kong regained his memory through battle after battle. When Xia was captured by the organization, he temporarily restored all memories and body and rescued Xia...