LF Manga

I vaguely remember the plot but I think it was mostly just smut oneshots. One of the stories was a straight couple who pretend they like sex with each other but hated how vanilla it was. They tried to cheat behind each other's back on an app, but ended up matching together lol. Both of them got angry and were basically arguing about how much better they are at sex, etc (?). After all that, the couple stay together and happy because their chemistry was actually pretty good xD