Wakana Mizuki visits her husband's workplace to deliver a forgotten item, only to come face to face with Aikawa, her former lover. He is now her direct superior, a man who once trained her as his sexual plaything and awakened her deepest desires. Their past was filled with intense pleasure, but ultimately, she was nothing more than his temporary amusement. Eventually, Mizuki moved on to build a happy marriage with the man she loves most. To her, Aikawa was a chapter best left buried—someone she never wanted to encounter again. Yet this unexpected reunion stirs long-buried emotions, shaking her to the core. How will Mizuki confront this reappearance from her past? As memories resurface and collide with her present life, the story unfolds with escalating tension, desire, and surrender.