Yasuno Yumi, 50 years old. The secret of her life that unfolded at a class reunion where she returned home. Her beauty from her days as a Madonna is still intact. She goes to a hotel with a classmate on impulse. Even though her rational mind hesitates, the "woman" sleeping deep inside her won't allow it. Dazzled by the man's scent, she sucks him enthusiastically and feels pleasure in his mature vagina. The time limit is until she returns to her daily life. She lets it all out at a naked orgy-filled class reunion...