Matsuzaka, a lonely middle-aged man, comes home from his job as a security guard and witnesses an unbelievable sight in his apartment! A beautiful woman he's never met is cleaning the stairs! She's also braless and pantyless... She's a married woman named Non who moved into the neighborhood. She has a cute, fluffy face that's soothing just to look at, marshmallow-like F-cup breasts, and a glimpse of her beautiful pineapple pussy... Matsuzaka's daily life changes with the arrival of this abnormal neighbor!