The lonely middle-aged bachelor, Matsusaka, witnesses an unbelievable sight at his apartment when he returns home from his security job! A beautiful woman he doesn't know is cleaning the stairs! And what's more, she's doing it without a bra & panties... It seems she's a married woman named "Non" who recently moved in next door. Her adorable, fluffy-type face is healing just to look at, with marshmallow-like F-cup big breasts, and a glimpse of a beautiful pineapple pussy... With the appearance of the abnormal neighbor, Matsusaka's daily life is completely changed!