A young man, now accustomed to living alone, marks the third anniversary of his real father's passing. One day, a woman who was once his father's student suddenly appears. She says she was taught by his father when he was a university lecturer and wishes to pay her respects. Invited into the young man's home, they spend a quiet time together, sharing memories of his father. Through her stories, a side of his father unknown to the young man comes to light. Deeply moved by her words—her desire to repay the debt of gratitude to his father—he feels a powerful emotional pull. As the feelings of everyone involved intertwine, a new story begins to unfold.