This story is pretty similar to one that Kawasaki Tadataka draw a long time ago:
/g/433495/2bbaf5cda4/
Its the story of two couples where the girls are too shy/stupid to tell their partners that they prefer a different kind of sex they are having (the one who is having gentle sex wants it rough and the one who is having it rough wants gentle sex). So when at some point they swap partners they notice that they have better chemistry.

In Kawasaki's work this happens pretty fast, so there no feeling of anyone being stolen by anyone. Just people that notices they are more comfy with someone else and thats that. Here the story takes way longer, with each partner having hidden sex with the others partner apart from the swappings.
That and the fact that the blondies boyfriend has that im-gonna-steal-your-girl aura, the brunette has the aura of girl getting stolen and her boyfriend has the perfects cucked face, makes it all look kinda netorarish but it isnt.

And if this was considered female:netorare then we also need a male:netorare tag. Upvote it.

Base +7, Narutlih +6

Distributed separately.
https://www.dlsite.com/books/author/=/author_id/AJ022758
https://book.dmm.co.jp/series/?floor=Abook&series_id=903439
https://www.amazon.co.jp/gp/product/B085G2DL8B
https://booklive.jp/product/index/title_id/684739/vol_no/002

Base +28