Honoka lives with her daughter and son-in-law while her husband is away on a long-term business trip. Although she is surrounded by the kindness of her family, she cannot fill the physical loneliness and indulges in masturbation every day. However, her son-in-law Ichiro is watching her... Kokoro by his extraordinary huge cock, Honoka invites him out at any time and enjoys his extraordinary huge penis. At first, Ichiro tries to refuse out of obligation to his wife, but he is Kokoro by Honoka's seductive and alluring appearance and before he knows it, he cannot help but have lustful intercourse with her...