The wife living next door was always a quiet, well-behaved, and reserved woman. A wife who only replies in a small voice even when greeted or spoken to. One day, a man who was a neighbor was looking at his smartphone's SNS alone, and among the lewd accounts of the world's wives who said "Looking for fuck buddies" and "Lonely because my husband is away," a photo of a woman with a somewhat familiar back view was uploaded. "This... it's similar to the quiet wife next door...?"