Mai continues working after marrying her gentle but somewhat useless husband, remaining a reliable figure both at home and at work. However, she's unlucky with her boss at work, suffering daily bullying and emotional abuse from her department head, Ota. One day, she makes a grave mistake with a business partner. Ota protects her, but in exchange, she gives him her body. Although it's unwilling sex, the stimulation deep within her vagina by his much larger penis causes her to whisper "I'm sorry" as she moves her hips to orgasm…