This is a black-and-white style, free-to-explore tricky game. You will play as a cat with a big tail, freely exploring in the black-and-white world.

During the day, you can freely explore this world or obtain energy by clearing away plants.

At night, you can try to catch mice. The mice are extremely cunning, and there are numerous traps at night. Fortunately, you have the ability to revive infinitely. Remember these traps, predict and avoid them, catch the mice, and obtain energy.

You can use the energy points to enhance your various abilities so as to catch the mice more calmly.