Yuri Sanada, now in her 15th year of marriage, receives little attention from her husband. Unbothered, she enjoys shopping with her son, delighting in having him help her pick out clothes, always smiling warmly. Yet, deep inside, loneliness and restlessness begin to stir. As a woman, she longs to keep that thrilling, heart-pounding excitement alive forever. Even treating her son as a substitute lover doesn't recreate the true flutter of romantic love between a man and a woman. These conflicting emotions start to shake her heart.