In the Edo Era! Matsuri Tsukimiya, a stunning young woman adored by all, faces a daunting dilemma... Her beloved Yonosuke Tsukimiya is not interested in her. Despite her mature confession of love, he dismisses her affections... After all, they have known each other since childhood and are practically like family! Matsuri has always seen herself as part of his family, which is a shame... Matsuri-chan! However, she has a strong motive for wanting to change Yonosuke, who is seeking revenge against the general who killed his former love. Seeing him put his life on the line for vengeance, Matsuri decides... "I will become his reason to live." She plans to fill his heart and mind with herself, leading him away from the destructive path of revenge. Even if he sees her as family, Matsuri is determined to be his devoted and unwavering source of strength.

This is the physical copy of the Until Your Sword Breaks manhwa.