Noboru, who was invited to her home for the first time, arrived earlier than the scheduled time due to tension. Then it was not her but her mother Rina who was waiting there. Two people who have to wait for her to go shopping together. Noboru is worried about Rina's chest, which has a pheromone that is more sexy and bewitching than her. And Rina who saw such a cute appearance of Noboru could not suppress the desire that boiled up for the first time in a long time, and just provoked with the adult's sex appeal.