"Cheating is good" is definitely not the lesson I learned here. It's nuanced in the sense that not everyone can and will do the things we as audiences want them to do, like couple's therapy or even just talking it out.
So far I'm liking Ichinose's combo of aloof gyaru, gap tsundere, and baseball otaku, and Nagisa's signature Yamamoto charm.
But honestly, everybody's top tier in this manga. Get this a quality anime adaptation and inject this to my veins.