One day, while Seiya was calling everybody on the phone to tell them "It's me, thank you" on the rooftop of a building, a strange creature with emerald-blue fur, something he had never seen before, descended from the sky. The creature, along with its companions, claimed they had come to exterminate human race. However, through conversations with the humans they encountered, they gradually began to understand each other...
Wakaba saves her classmate Koki who was being bullied. From then on, people who are involved with Wakaba are killed one after another. When the murderer is found out, Wakaba realizes what true love is.
One day, a strange thing comes to her, who is suffering from being sexless with her boyfriend.