Five years after divorcing her husband, Maika brings her son Masaru and friend Kenta to go clam hunting for the first time in a while. She was enjoying being friendly and collecting clams on the beach, but when Maika suddenly returned to the inn, she felt the forgotten man's odor in Masaru's underwear, which she had taken off, and she couldn't help but masturbate. However, Kenta sees her and Maika is blackmailed... and call her aunt