Kimi no Katana ga Oreru Made - Tsukimiya Matsuri no Koigataki

In Edo-era Japan, Tsukimiya Matsuri is admired by those around her, but the man she loves, Tsukimiya Yonosuke, sees her as family. They have known each other since childhood, and even Matsuri’s carefully made confession fails to change how he regards her. Yonosuke is consumed by a quest for revenge against the man who killed his former love. Determined to pull him away from that path, Matsuri decides to become his reason for living and fill his thoughts with her instead. Devoted and strong-willed, she sets out to win over someone who still thinks of her as family.