Kosuke enters the narrative while scavenging leftover school lunch, facing an unexpected crow attack. This incident prompts intervention from Nyan and a wanderer named Ryuji, averting immediate harm. Subsequently, crow assaults intensify dramatically over following days. The escalating avian aggression fuels a broader conflict endangering the local park—a sanctuary for neighborhood cats. Kosuke’s involvement directly links to heightened tensions between crows and cats in their shared environment, initiating events that require Nyan’s actions to restore safety and harmony.