Not only does the Mc’s friend is NTR'd by the MC, but the MC gets NTR'd by practically every enemy they come across with every female character becoming "broken" and becoming "unsatisfied" with the MC. Even in the most recent light novel chapter that is currently out by the time of me writing this has it so that the MC is currently being cuckholded right in front of him by various adventurers, nobles and etc. The reason for the NTR happening to the MC is mostly due to the curse as the curse causes it so that the MC can only have s*x with the girls once a week, so due to this curse, the girls go out and satisfy themselves with other men while they slowly get addicted to having sex with other men while they are on a journey to dispel the curse. Throughout the story, the girls are still on good terms with the MC it seems and the MC does not seem all too bothered by it in most cases. .