Five years after divorcing her husband, Maika took her son Masaru and her friend Kenta to go clam digging for the first time in a while. She enjoys gathering clams on the sandy beach, but Maika, who suddenly returns to the inn, feels a manly smell in Masaru's underwear, which she had forgotten about, and unintentionally masturbates. However, Maika is blackmailed when Kenta sees her. And when she is called her aunt and played with like a female pig, Kenta gets involved in her ending even more than her beloved.
