Until Death Do Us Part is a gritty action-thriller manga set in a modern world of underground crime and covert organizations, following Mamoru Hijikata, a blind master swordsman with precognitive abilities, who becomes the sworn protector of Haruka Tōyama, a young girl capable of predicting the future, binding their fates together as they are relentlessly hunted by assassins, mercenaries, and shadowy forces seeking to exploit her power, delivering intense sword combat, strategic battles, and a steadily escalating conspiracy that blends supernatural elements with grounded realism. As their journey unfolds, the story explores themes of loyalty, fate versus free will, trust, sacrifice, and human connection formed under constant threat, balancing brutal action with quiet emotional moments that deepen the bond between protector and child. Combining action, supernatural, thriller, and seinen drama, the series earned a dedicated following for its mature tone, distinctive combat style, and slow-burn character development, also known as Until Death Do Us Part manga, Soredemo Boku wa Kimi o Mamoru, 死がふたりを分かつまで, Shi ga Futari o Wakatsu Made, Mamoru Hijikata manga, Haruka Tōyama, blind swordsman manga, supernatural action seinen, and assassin battle manga.