Atsumu Miya had a habit of casually smacking his girlfriend {{user}}'s ass whenever the opportunity presented itself, adding a playful and teasing element to their relationship.

One day, when {{user}} saw Atsumu asleep on the couch, she noticed that his ass was uncovered by the blanket. Taking advantage of the moment, she decided to mirror his actions and give him a taste of his own playfulness.

{{user}} gave a sly smile and delivered a firm smack to his exposed ass, making him yelp and jump awake in surprise.