[May contain spoilers]
To be honest I agree with pretty much everything Lillian said below. I really liked this story at first but after dragging it out for so long it's just become repetitive. The sex is really hot but the plot is always the same, it really is just stupid drama that makes them split up then have make-up sex, then rinse and repeat! To be fair that is quite often the problem with multi volume manga but there are some that keep things interesting and fresh. However this just doesn't.
The one thing I do disagree with Lillian about is Keiichi's attitude. He did piss me off at first due to being so cold and domineering towards Shingo, however now I kinda see why he is. Shingo was already a slut who would immediately go to someone else for comfort and now has also become a total wuss, crying over every little thing and still not trusting Keiichi even though he has done so much to prove his love. I mean they moved in together, Keiichi introduced him to his family, and constantly told Shingo how much he cares for him, but Shingo is still so caught up with being abandoned that he continuously pushed Keiichi away. It's no wonder Keiichi would be annoyed and hurt too.
I already think this has been dragged out way too long, but apparently there will be yet another instalment even after this one is finished! And my guess is:
a) someone will come along and try to tempt Keiichi away. Shingo will get paranoid despite now having a ring from Keiichi to prove his commitment. This doubt of his will upset and anger Keiichi.
Or b) shingo will start acting weird and distant again for some reason, most likely because he fears being left, and this will make Keiichi annoyed and/or suspicious. He will question Shingo who will then get defensive and evasive, all while crying and acting like a b*h.
And then in either situation they will fight, Shingo will try to break up, Keiichi will fk him roughly then leave Shingo in tears. Couple of chapters later they get back together. The end.
Seriously that seems to be the only plot for these two.
To be honest this is one of the few series that I don't like reading but still do out of curiosity. It always leaves me with quite a bitter feeling despite really liking the many hot sex scenes, just because the constant drama and stupid fights piss me off. I always stupidly hope for positive development, but instead I'm just left with regret. Anyway, I hope I'm wrong about the next, and hopefully final, instalment!
I'm rating this 7/10 just because I like the smut and I love some of the side characters.