Ayano Mori has turned seventy this year. Recently, on the occasion of her seventieth birthday, she celebrated with her entire family. Though her husband has already passed away, she lives peacefully with her son, daughter, and their families. Today, her grandson Jiro, who works far away, made a special trip to visit and celebrate with her during a break from work. Kind and considerate, Jiro gently massaged her shoulders. Before she realized it, his hands had moved to her breasts... Unable to refuse her grandson's desires, she finds herself enveloped in comforting warmth, yet burdened with complex emotions deep within her heart.