JBD-304 Please forgive me... Bondage Special Edition: I Fell into the Rope, Shiramine Ikumi

Worried about his father, Ippei, who is depressed after being advised to retire early, Hiroto and his wife, Minami, invite him over to live with them for a while. Ippei soon discovers that Minami is sexually unsatisfied, so he secretly trains the innocent Minami with the hemp rope that bound his late wife...