Mizuo is a cheerful girl who laughs a lot. However, her fate changed dramatically after her mother was shot dead by a hunter who mistook her for prey... Mizuo doesn't have his father, and is left alone. She is then invited by an old friend of her father to live in Tokyo. She is determined to find her mother's killer. What will become of Mizuo, who has forgotten how to smile? Also contains Nigatsu to Sangatsu no Aida ni, Rokugatsu no Oka, Chou no Yume, and Mienai Yuurei