After her husband is transferred overseas for work, Nozomi proposes to live with her father-in-law, Tohru. Since losing his wife, Tohru had been depressed and withdrawn, but gradually regains his vitality upon seeing the beautiful Nozomi. Her elegant demeanor, combined with an undeniable feminine allure—especially her sensual lips—begins to stir emotions within him. One day, he gently presses his lips against hers as she sleeps. From that moment, Tohru is completely captivated by Nozomi, and despite his son being present, finds himself increasingly drawn to her body and lips, unable to resist his forbidden desire.