The woman who moved in next door to middle-aged unemployed man Miyazaki is a lewd married woman named Yuu who is obviously very responsive to sex! One day, she suddenly appears in the shared area of ​​the apartment, and while cleaning, she seduces him by showing off her large breasts and obscene vagina, which are ripe for the taking! Miyazaki is easily seduced by the beautiful woman who approaches him intimately with her in a lewd outfit, and in no time at all, he becomes a convenient dick for an affair! Will he run out of sperm first, or will his wife be satisfied first? The neighbor's affair has just begun!