A re-release of a work themed around forbidden age gaps and incest. The grandmother is 63 years old, and Masaki is her son's eldest son—their first grandchild. Though Masaki's parents had a troubled marriage, they managed to keep their family together. However, when his mother ran off with her lover, Masaki became deeply distrustful of women. The only person who supported him emotionally was his grandmother. After much deliberation, the grandmother decides, "I'll be the one to take Masaki's virginity." Overjoyed, she—though past menopause—experiences the pleasure of being a woman again after a long time. She then vows strongly, "I won't let any other woman have Masaki."