Waking in a grimy urban rental with no memory of his past, Rin finds his only companion is an ancient, ominous dagger, and his body possesses an inexplicable, lethal grace. This is a world where survival hinges on the blade, a truth brutally reinforced when he's forced into the Shadow Academy—a ruthless institution disguised as a school, where every lesson is a fight to the death and killing is the only way to live.
Initially an easy target, Rin's innate survival instincts are brutally awakened through constant bullying and life-or-death trials. He begins to tap into a dormant, terrifying power, slowly remembering fragments of his past as a top-tier assassin. Just as his true strength resurfaces, he encounters a girl whose face is hauntingly similar to his lost love's—a face that ignites a fierce, protective instinct. But in this merciless academy, where trust is a fatal luxury, he soon discovers she's no ordinary student; she's a master in her own right.
Can Rin reclaim his lost memories and his love in a world steeped in blood and betrayal? Or will his forgotten past as a deadly assassin drag him deeper into the shadows he seeks to escape? His journey through the Shadow Academy is a brutal quest for identity, survival, and the chance to protect the one person who might hold the key to his fractured soul.