Imagine going home after a tiring shift from work... when you open the door, there lies a paradise of three fluffy house cats! This story is about a tired office lady living with her three unique cats. They interrupt her meals and when she's cleaning, and has to put up with their moody attitudes. Her everyday life is constantly at the mercy of her cats!

Tsukiko Yano is a transfer student at a high school where she doesn't find anyone or anything interesting. That is, until one evening when she sees her classmate Aya Utsumi swimming in the school swimming pool. After that, she can't help but see fish swimming all around her.