鬼斬丸 ～胡蝶乱舞 退魔淫伝～

The forest. One bright afternoon a young girl takes a walk. She is pleasant to look at, beautiful in kimono and nice hair and makeup. "Little girl..." Somewhere, a voice calls to her. "Hey little girl." There's no one around. She's alone. Not even a beast or bird has been seen. "I am the Butterfly. Remember me now." The strange voice sends a chill up her spine and down the length of her sword. The sword that was once a demon, transformed by a promise she made. The sword called OniKiriMaru.