Chieri, a female teacher, was secretly in love with a student named Shinji. Their relationship was platonic, with "nothing going on until graduation," but their breakup came suddenly. Chieri was the woman Shinji's older brother, Shinichi, had chosen to marry. Shinji sensed something was going on and approached Chieri, but she wouldn't tell him anything... A few months passed, and Chieri's smile faded with each passing day. Unable to bear seeing Chieri like that, Shinji made a "decision"...