In “JK to Ero Konbini Tenchou 4,” the convenience store manager continues his secretive, lustful relationship with the high school girl, Yuno, who visits after hours. Their encounters become increasingly bold and unrestrained, with Yuno eagerly exploring her desires under his guidance. They surrender to their passions in the quiet of the shop, deepening their forbidden bond through intense, whispered confessions and urgent, graphic intimacy.