Clear skies. Idyllic mood. A good old Japanese-style house in a certain mountain village. Engawa. open window. Mother-in-law, Sayuri Sekimoto, and wife, Nao. Wearing an apron in a different color, they got along well, sticking out their buttocks on all fours and wiping in a good mood. And Daisuke's heart throbs at his mother-in-law's sexy smile, but...