Yep, I feel that too. Character development is an important thing even in smut manga, and I can say Keiichi is just so full of himself by doing whatever he wants. I really want sensei to make him at least behave as a gentle seme for Shingo. Sometimes I think this manga is such a waste just because the seme. Sensei's works are great but this series now is like meh. I like that kid x sensei story more, so much calm for me.
Yeah, the sex is hot, but I agree, Keiichi is annoying. He never considers anyone, even when he does something "nice" like getting the calico kitty out and calling the sensei to make them meet it was only because he wanted the other kitty out. Why did Shinto hide the fact that he knew calico kitty? Because Keiichi is an insecure jackass. Overall, the smut is top-notch, but their whole relationship is build on sex only. Keiichi never listens to Shingo's requests.
This is going to be a really unpopular opinion but I really really want some character development from the seme's side. They are always ever having sex or solving problems with sex. I used to be so excited with his manga but now I'm like eh... The sex scenes are nice and all but there comes a time where you wish they would understand each other a bit more and develop a healthy and honest relationship. I am so looking for that in this manga. Anywayranslators did a great job!