Six months ago, Mika Jou celebrated her 70th birthday and began experiencing chronic shoulder and lower back pain that started interfering with her daily life. However, after being invited by her grandson, Yoshiyuki, on a hot spring trip, her pain eased significantly—sparking a new passion for travel. Unknown to others, she has been engaged in a physical relationship with her grandson for the past year. Mika had been troubled by the fact that she remained a virgin well into her 20s, and decided to take the plunge into intimacy with him. Touching a man's penis again after so many years reignited her long-dormant libido, and she continues to enjoy regular sex with her grandson, which has become an essential and cherished part of her life.