Sei works part-time while aiming to pass qualification exams. He has no hobbies, and his only enjoyment is watching videos of 'Mrs. Robinson,' an adult woman with large breasts whose face is not shown. Just seeing her moist lips tells him she must be beautiful. Another source of pleasure for him is observing the unsuspecting housewife living across the street, unaware that Sei watches her... His life turns rosy after he realizes these two women are one and the same.
