Yuki Kurozawa is a quiet but kind-hearted 16-year-old student attending a remote boarding school in Japan. The school is unique—completely isolated, with only two classes in the entire grade, much like a closed system. Despite not being popular or a standout, Yuki is well-liked. He treats everyone with respect, avoids drama, and maintains a warm presence. Even the more popular students seem to get along with him. His life is calm, uneventful... until everything falls apart.

  One day, after a brief conversation with his teacher about his decent but unremarkable grades, Yuki walks up to the rooftop to reflect. As he leans casually on the railing, deep in thought, he's suddenly and violently shoved from behind. He doesn't see who did it. There's no scream, no last words. Just the rush of wind and silence before everything goes black.

  But death was not the end.

  Yuki awakens on a beach near the school, not as himself—but in a completely different body. White hair. Cold gray eyes. A strong, lean, and athletic physique unlike his original one. Next to him lies a black, empty hearse... abandoned. A cruel attempt to dispose of him? And there, caught in a tree branch, he spots a torn piece of school uniform fabric—the same kind worn by his classmates. The realization hits hard: his murderer was one of them.Now reborn as Ryuma Shirase, Yuki reinvents himself with a new name, a new attitude, and a completely different presence. Gone is the warm and trusting boy. Ryuma is calculating, sharp, and emotionally guarded. He re-enrolls in the school under his new identity, posing as a transfer student. His goal: uncover the identity of his killer.

  Stolen story; please report.

  As Ryuma navigates the strange and secretive school, every classmate becomes a suspect. Some are overly friendly, others distant. But none can be trusted. Each interaction becomes a potential clue—or a trap.

  Worse, as he digs deeper, Ryuma begins to unravel the school’s unsettling secrets—hidden agendas, covered-up events, and the fact that his murder might be part of something far bigger than just a personal grudge.

  While his instincts sharpen and his physical abilities far surpass those of his former self, Ryuma knows one thing for certain: if he dies again, there may be no second return.

  And so begins a dangerous psychological and emotional game between Ryuma and his classmates. In a place where trust is a weakness, and smiles may hide knives, Ryuma must figure out who killed Yuki Kurozawa... before he becomes their next target again.