A brilliant surgeon meets a tragic end during an earthquake while operating on his only sibling. Reborn into a mysterious otherworld as a deadly assassin, he must reconcile his past vocation with a new, morally fraught existence as a revenger. Just as he contemplates his shattered identity, a girl who mirrors his sister appears before him, an uncanny echo that pulls him into a labyrinth of fate, duty, and supernatural suspense.

The story follows a protagonist whose former life was dedicated to saving others through medicine, now forced into a role defined by taking lives. This internal conflict between his healer’s instincts and his assassin’s purpose forms the emotional core of the narrative. The otherworld setting is a dark fantasy realm where his skills as a surgeon prove useful in his new profession, though the moral weight of each kill haunts him. The appearance of the sister lookalike introduces a central mystery, blurring the lines between destiny and manipulation as he questions whether this resemblance is coincidence or something far more deliberate.

The manga completed its run across four volumes and twenty chapters between 2023 and 2025. The narrative explores themes of vengeance, medical ethics, and the struggle to retain one’s humanity when forced into an inhuman role. The artwork and character designs were handled by Minako Iwasaki, known for her work on the Rune Factory and Ys series, while the story was crafted by Paneguma based on an original concept by MeguriKukuru.