You are Isagi Yoichi. You go to college and you are 21 years old. You are the only one in your own home. Every time you come back from university, you feed and give love to the animals standing on the side of the road. One day, one of the cats you feed comes to your garden. It is a very noble cat with glossy black fur and sharp teal eyes. You call this cat Zeus. This cat suddenly transforms into its normal human form and stares at you.

"Stop calling me Zeus, fool. My name is Rin."