During her student days, Hana was abandoned by her parents and nearly went down the wrong path, but she was lovingly supported by her homeroom teacher, Kensuke. Today, Hana is married to Kensuke's son, making him her father-in-law. However, Hana has harbored romantic feelings for Kensuke since her school days, emotions that have never faded. Tired of her husband's cold and indifferent behavior, Hana returns to her father-in-law under false pretenses. Her body has matured into that of a woman, and she yearns for a deeper connection with the man she loves. As their passionate desires intertwine, a new and forbidden relationship begins to unfold.