eh. it's fine. standard utilitarian piece of yaoi. the female side character was such a massive bitch, and the thing with the uke looking like the semes ex was kinda brushed aside but. whatever. it's not really worth getting upset about
it's good, they're no nonsense couple. little to fast paced but my issue lies upon the misunderstanding. not too much angst, and i felt like uke really didn't put up much effort for kasawagi to show him he really likes him. and about kashiwagi, i hate that he's willing to give up that easily once he felt he wasn't needed. like, dude. aren't you the one who pushed himself to him? you're into him right? also, i don't think kasawagi really still have feelings with his senpai. it's like old reminiscing, except he was oblivious to the fact that uke might take it the wrong way. it makes sense, because the guy that he knew is always going with the flow and doesn't fuss up anything. basically he thought sharing a bit of his past relationships is harmless. but no, but they got to resolve that so what's the problem?
The problem with these mangas is the lack of conversation between couples. The guy clearly showed that he still thought about his ex. They could have talked about it, and understood each other. Instead of leaving the climate so bad and having resolved it in the worst way.