In a war-torn era, Tenyo and Uru are two elite soldiers fighting side by side for the Crimson South. Their bond runs deeper than mere comradeship; they live together and share a deep, unspoken love for one another. This connection is severed when Uru is killed behind enemy lines, leaving Tenyo behind with nothing but a final kiss and a promise to continue living.

Two years later, Tenyo has become a lone warrior still consumed by grief and a vow to finish what his beloved started. When he sneaks into the territory of the Azure North to assassinate the enemy general, Kakezuki, he is stunned to find that the general has the exact face of his lost love, Uru. Overwhelmed, Tenyo is captured but learns the terrible truth: Uru’s body was recovered by the enemy and transformed into an "Immortal Vessel." While his physical form lives on as the powerful General Kakezuki, his memories, personality, and very soul have been erased, leaving behind a being who no longer eats or sleeps and who lacks the emotions of the man Tenyo once knew.

As Tenyo is drawn into the world of the Azure North, he meets Toka, the enigmatic figure behind the creation of these immortal vessels. Rather than kill him, Toka encourages Tenyo to stay close to Kakezuki, raising questions about whether a past love can be resurrected or if a new one can be born from the ashes. This situation creates a unique dynamic. Tenyo must navigate his lingering devotion to the ghost of Uru while watching Kakezuki exhibit flashes of his former self through muscle memory and fighting style. Simultaneously, the immortal general begins to develop a curiosity and affection for Tenyo based solely on their present interactions, slowly regaining fragments of humanity he was never meant to have. The first volume establishes this supernatural love triangle set against a Chinese-flavored fantasy backdrop, exploring whether Tenyo is falling in love with the same man twice or learning to love someone entirely new. The narrative arc of the initial volume focuses on Tenyo’s discovery of the truth, his shifting resolve to restore Uru’s soul, and the growing, complicated bond between him and the being known as Kakezuki. The story is ongoing with a second volume expected to follow the consequences of these revelations.