My father remarried a beautiful woman who was almost the same age as me. My father, who is busy with work and tends to leave the house, so I (Yui Kawagoe) and my young mother-in-law Kanna (Kanna Shinozaki) are spending more time ... One day Yui who saw her mother-in-law's masturbation gradually embraced emotions that she had never felt before ... Kanna Shinozaki's long-awaited lesbian ban work!