Kimi ga Shinu made Koi wo shitaiI Want to Love You Till Your Dying Day; きみが死ぬまで恋をしたい; Kimi ga Shinu Made Koi wo Shitai; きみ死ぬ; Kimishinu; My Wish Is to Fall in Love Until You Die; I Want to Love You Until You Die; Pragnę Cię kochać aż do Twej śmierci; Хочу кохати, допоки ти не вмерла; เพียงได้รักตราบสิ้นลมหายใจ; Keinginanku Adalah Jatuh Cinta Sampai Kamu Mati; 与你相恋到生命尽头; 네가 죽을 때까지 사랑하고 싶어

There's an orphanage which trains its charges to be weapons of war, assassins specialized in magic. At this "school" Shiina has been having a difficult time coping with her roommate's death. She completely ignores rumours, including that of a supposedly impervious student by the name of "Mimi," who is thought to be even stronger than the teachers and isn't part of any group. While taking a breather, she encounters an overly cheerful young girl covered in blood, and they chat for a while before the child is hauled away by the school nurse. Shiina thought that they wouldn't meet again, but the next day, the girl transfers into her class and cheerfully introduces herself as Mimi.