The regret of the seme only happened near the ending so it's short and not satisfying, at least for me. I feel like I also read a similar story in the same genre somewhere, I'm not sure. But still, it was nice to read. I enjoyed it a little.
It's very cute. The first couple best suits this list. The seme found out about the unrequited love of uke when he saw the writing on the wall that he is plastering. It's short though because it's a multiple story. It's also a reunion type of story.
I was also nervous when the seme found out that the uke has something to do with something the seme hated the most. Why does the seme's personality feels more like an animal predator than the uke who has animal characteristics?
Sutemi no Koubousen