Yuta enrolled in a boarding school to forget his feelings for his father's new wife, Minami. His fulfilling school life was about to end, and on the day of the graduation ceremony, Minami ran up to him with a smile. The long-awaited reunion brought back the feelings he had locked away in his heart… That night, as they spent time alone celebrating graduation, Minami said, "This is my graduation gift to you..." and kissed him, entwining her tongue gently. Thus, the boy took one step at a time towards adulthood―.
