Who held me in the darkness...?

Toko is a wife who doesn't know any men other than her husband Yoshimasa and is reluctant to be seen as a strong shy person. The couple's affairs were always turned off the lights and exchanged in pitch black. Yoshimasa loved Toko, but there was something I suddenly thought about. "Is Toko satisfied? What kind of voice will she make if she is held by another man?" Then Yoshimasa asks a young man she met online to hold her wife, and gently calls out to Toko, who is waiting with the lights turned off without knowing anything, signaling the stranger...