Kimi no Mukougawa
The staff at the school and the uke's parents are asshats and the seme and Kanako are annoying, but the uke is so wonderful and kind that he makes the story worth reading.
Tsukigasa
In the progression of beginning-middle-end, the middle was lacking. It felt like as soon as the context was established, the mangaka decided "Okay! Let's wrap this up," and slapped on an ending. It made the transition from angst to lovey-dovey humour too quick and I was left feeling that a lot could have been elaborated upon and made more impactful.
Mangetsu No Ou