Yu's parents go on a trip and she is left alone at home. Then her neighbor, Kiyomi, comes to look after her. Yu feels happy and nervous to be able to spend time with the aunt she has admired since she was a child, but when Kiyomi's husband, Shigemichi, comes over, he devours Kiyomi's body in someone else's house. Having spied on the two of them doing this, Yu is unable to sleep at night, and finally makes up his mind and heads to Kiyomi's room...