Mother-in-law's tongue and kiss

It has been three years since my father, who often travels on business, remarried. While her son Shinya was happy spending time alone with his beautiful mother-in-law, Shihori felt lonely living without her husband. As if seeing through her loneliness, one day Shihori is approached by her son's friend, Hidemi. A body that resists but is filled. Afterwards, the two continue their obscene relationship, but Hidemi, who learns of Shinya's feelings for Shihori, blindfolds Shihori and quietly invites Shinya into her room...