Miyane Kokoro comes back to the city he'd moved away from 7 years prior, due to his parents' transfer. Now attending the same school he'd visited so many times as a kid, Kokoro can't wait to see Chanko – the stray cat that lives there – again, even if it's past curfew. However, his attempt to find Chanko fails when he ends up getting caught by the school nurse, Hiragi.