Since her husband was hospitalized due to injury, yuki kokona has been feeling sexually frustrated. At this time, her husband's best friend, tetsuya, came to check on her alone. Her lonely body aches for his manly presence, and as soon as she sees him off, she begins to indulge in lewd fantasies. Tetsuya had only come to help with the housework. But what am i doing... Guilt-ridden, her hand reaches for her secret place and won't stop. But then, tetsuya returns because he forgot something...