Rin, who had just come from the countryside. She is plain and shy, easily pushed around, and can't resist when someone above her insists on something. One day, she saw a help-wanted sign at a nearby convenience store while hesitating, the manager called out to her and she was hired on the spot. Her large breasts couldn't be hidden, and she fell into the manager's trap. If you go to the convenience store, you'll be subjected to disgusting things by the hated manager, and even though Rin knows this, she can't quit her part-time job. The reason is… 'Just touching myself isn't enough, these nipples have turned into greedy nipples.'
