Satoshi is a university student whose father has been transferred to another city and whose mother has returned home to care for his grandmother, leaving him living alone. One day, Marina, a young wife from next door, comes to bring him dinner and Satoshi welcomes her in warmly. As if she could see through Satoshi's Kokoro, which is transfixed by her voluptuous body, Marina abruptly kisses him... Kokoro by this sudden act, Satoshi, a virgin, pushes her down like a starving animal and shakes his hips at the mercy of his lust. A while after their dreamlike first time, he ends up cleaning up the neighborhood with Marina...