The top killer Kurokawa Minato, codenamed "Raven", faked his death after erasing the organization's files, and carried a high school admission application form in his arms, trying to restart his life as an ordinary student. However, at the age of seventeen, he could kill twenty-three militants in three minutes, but he could not solve mathematical function problems; he could intuitively avoid the reflection of a sniper scope, but he could not learn "normal" social distance. On the day of the entrance exam, the reflection on the roof of the teaching building revealed the assassin's presence - but the target of the sight was the girl Hayakawa Chinatsu who had just lent him a bandage. When the bullet grazed the playground lawn, Kurokawa Minato protected the opponent with instinct, but it also exposed the reaction speed that "ordinary people" could not have. The blood-stained shirt, the calluses on the tiger's mouth, the abnormally accurate physical data... The murderous intentions and secrets hidden in the daily life of the campus are pushing him to the cliff of "disguise" and "truth". When organized pursuits, mysterious enemies and ordinary girls become intertwined, can Raven really learn the cost of "not being a killer"?
