It's been three years since my father, who travels frequently, remarried. For her son, Shinya, spending time alone with her beautiful mother-in-law was a happy time, but Shihori was feeling loneliness in her life without her husband. One day, as if seeing through such loneliness, Shihori is pressed by her son's friend, Hidemi. A body that is filled with resistance. After that, the two continue to have a lewd relationship, but when Hidemi finds out about Shinya's feelings for Shihori, she blindfolds Shihori and quietly invites Shinya into the room...
