I'm surprised at how much I don't hate this. But it really has been a story that handles the topic with some nuance. So far. Admittedly, a large amount of the narrative is the MC being insecure and the GF having to reassure him. But it hasn't been gratuitous, mean spirited or fetishizing the idea of her cheating on him.
But I don't trust the Japanese to not fuck up an ending. This whole "Can I be in a AV?" Arc sounds like trouble but I will give it the benefit of doubt for now. I may check back in on this story in a while.