Ritsuka Tachibana. She lives a calm and unchanging life. Ritsuka’s older brother Lindo returns from studying abroad in the United Kingdom. Shikou Academy student council president Rem Kaginuki calls on…

When a stray black cat named Kuro crosses Mahiru Shirota’s path, the high school freshman’s life will never be the same again. Kuro is, in fact, no ordinary feline, but…