JUL-773 The manager and his wife live on the upper floor of the apartment. - Neighborhood relationship that would never be okay if it was found out... - She lives in a company house where her boss's wife keeps squeezing her sperm. - Maki Hojo

Koji is a new employee working at a trading company in Tokyo. - He has just moved into company housing, but his stress is on the verge of breaking point as Director Hojo, who lives on the floor above, starts to interfere in his private life. - Meanwhile, he meets a mysterious beauty, Maki, inside the apartment. - Kouji was captivated at first sight, but he did his best to say hello. - However, Maki's true identity is Chief Hojo's wife! - ? - Since then, Koji has been trying to keep his distance, but one day when he was hanging out the laundry, a pair of women's underwear fell from above him...