A lonely, empty room, a disappointing life, the only thing that soothes him is the stray cat that appears in his garden... A tsundere girl appears before a lonely man. She's rude and unfriendly, but she's actually a spoiled brat! She wiggles her body with a mischievous smile and begs him to do dirty things! She slips into the Kokoro of a rough middle-aged man. Just when he sees signs of happiness, he gets caught up in an unexpected situation!?