Kisaki is a 17 year old high school student who likes her coffee. She lives with her father and brother is a sword shop and loves to hear the story of her ancestor who slew oni during the Age of Waring states in Japan (Sengoku Jidai). Her mother left when she was young and there is a Catholic Nun who is like a mother to her. While taking some katana's down to the store room she discovers a room that whose lock had been broken. Inside she finds a sword which no one has been able to touch for a long time. She is destined to fight Oni. For the new Era has begun. The time when God will bring about the end of this world. (Source: Bad Eggs)