Fatal Twelve

Shishimai Rinka was a high school student who ran a small café called Lion House in place of her grandmother. She lived her life like any other person her age, but one day she was surprised by an explosion when she was going home by train with her friend Hitsuji Naomi. In order to save her friend's life, she instinctively shields her the moment the explosion goes off, losing her life in the process. But before she knows it, she's back at the Lion House, happily chatting with her friends as if nothing had happened.