Clam hunting ~Dirty overnight trip with my friend, me, and my mom~

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. Maika was enjoying a friendly atmosphere and picking clams on the beach, but when she suddenly returned to the inn, she felt the forgotten man's odor in Masaru's stripped underwear and couldn't help but masturbate. However, Kenta sees her and Maika is blackmailed... And when Kenta is played with like a sow while being called an aunt, even his beloved Masaru gets involved...