Juri, a second-year student at Inugashira High, follows a daily ritual of feeding a grumpy cat by the riverside. One ordinary day, he discovers the cat in the arms of a stranger, Hiromi, a student from Sarutou High. Despite their schools being arch rivals notorious for their constant clashes, Juri finds himself drawn to Hiromi's cheerful demeanor and their shared love for the cat. As their secret friendship deepens, Juri's emotions take an unexpected turn, sparking a forbidden romance reminiscent of a modern-day Yankee Romeo and Juliet tale. Will their budding relationship survive the turbulent waters of school rivalry and hidden identities?