What a manga with the definition of wasted potential. Goes to show how ignorant the author is compared to where the majority of fans are. To put it easily, author realizes a big mistake in the latest chapters and decides to retcons the whole plotline, just because Author was peer pressured (Or something I don't know, either way) to back down of the whole plot.
A theme in relationships about insecurity is cheating. Or that feeling when you are unsure your beloved is cheating. It could be quite an awful feeling, and pretty difficult to bring it up. It is some of the worst actions another human can do because it ruins your whole trust in the relationship, and after the effect of cheating some could never be the same or have the same trust. Nobody should ever be cheated on.
Now put that idea in your head as you discover what these characters will do and how they will respond to these actions.
Pretty sure reader(you) and me after having read the thing above now understand why this is such a shitshow.
To say the most without spoiling reading this is seriously not worth the read. It is a massive flop in outcome and has the biggest disappointing character choices you will EVER see in a manga.
And to top off art is just disgusting nasty underage sx scenes. Which going back, these scenes have actually zero involvement in the story.
Again what a horrible way to go. Volume 4 must be studied and questioned years to come.
Read it idgaf, feeling sorry for all fans of yuri genre.