A little girl is on her way to school when she stops at the top of the stairs and screams. her mother comes running to see dead cat lying there. Riho is walking in the rain with an umbrella when she sees a little boy in the playground with an abandoned cat.Shido, Yayoi and Riho discover that the building complex where the boy, Shinji lives is the complex where dead animals have been found. That night, they come to the complex to see the mother with a box of animal carcass. Shido tries to catch Shinji who is a host for the low level breed but his mother protects her son.