I’m Undercover at High School. Why Has My Childhood Friend Suddenly Shown Up?

[Genius-focused + ensemble cast + slow burn + no System + one female lead Not a brainless power fantasy. The heroine appears in Chapter 16.] In an era of global high martial arts, cultivation civilizations flourish in countless forms. Daxia cultivators, Western mages, Federation psychics, Neon Onmyoji... The era of spiritual technology has connected the world’s great cultivation civilizations. On the surface, every nation joins forces to fight the calamity known as the “Black Tide,” but beneath the surface, dark currents churn. Lin Yan is a prodigy of the Demon-Slaying Bureau in Dongsheng Province, Daxia. At sixteen, he’s already a battle-hardened veteran with ten years of combat experience! After three years of war on the front lines, a single intelligence report sends him to the rear, a place he has never visited. The “Heavenly Demon Cult,” the group behind the human experiments that once placed him in the “Ascension Project,” still has remnants in hiding. The trail leads to Tiancheng High School, where a new conspiracy is brewing. Whether as a member of the Demon-Slaying Bureau or as one of the “Nine Defiers of Heaven,” fused with the source of the “Formless Wind” demon beast, Lin Yan is ready to wipe them all out. To round up the remaining cultists, Lin Yan puts on a school uniform and infiltrates the campus as a freshman. However, on his very first day at Daxia High School, he discovers a major oversight in his plan. Lin Yan is a genuine escapee from nine years of compulsory education: a bona fide illiterate who has never been to school! To keep his mission from falling apart over schoolwork, his superior forces an after-school tutor on him. But when Lin Yan returns to his lodgings that night and sees the familiar figure, his pupils contract... The “teacher” assigned to tutor him is none other than the childhood sweetheart he hasn’t seen in four years?