TW: double penetration, non-con violation, interspecies sex --- In a fantasy world setting, the protagonist is a nun who happens to be a member of the hero's party. One day, for some reason, the hero decides to invite a serpent monster into the party. However, it would seem there is some bad blood between the nun and the serpent... from days long past. The serpent has a grudge to relieve, and relieve it he does... using the nun's body... Day in, and day out.