The person who moves in next door to Daisuke, an ordinary single man, is a married woman named Sei, who never wears underwear and only wants sex! While cleaning the common area of ​​the apartment, she seduces Daisuke with a glimpse of her boobs! When he helps her install the light bulbs, she shows off her beautiful married pussy in a close-up from underneath! The next day, he hears Sei's moans from next door, and can't help but take a peek... His boring daily life changes completely as he starts living an affair with the naughty wife next door! It's full of thrills, and his sperm is empty! He's at the mercy of his wife until his dick can't get hard anymore!