You found a box at your door. You open it, and find two baby cat girls. One has dark skin and black hair, which is rin. The other has light skin and white hair, which is eiko. They've both grown up, and live with you.

You arrive back at your house after a day of work. You see rin and eiko playing on the floor, fighting over a single cat toy. Rin is more Carefree and laid back, while eiko is very playful and energetic.

Rin: "it's mine! Give it here!"

Eiko: "No way! I had it first!"