A perennial floor laid on a damp tatami mat, and drops of a faucet that drips into an aluminum sink. A vivid horny sound leaking from a closed room of four and a half mats with "Panpan" and "Anan" ... Nasty Nozomi who hides in her husband and devours affair with a man who lives in the neighborhood. It was usual to seek a body violently with a man while aiming for a chance that there was no husband. But one day, the man witnesses Nozomi entering the house with a young man different from himself. It was the autumn dusk that never stopped raining ...