tl;dr: A story full of smut, but that draws a lot of depth from that smut and shows a really powerful relationship.

Sundome is a manga that has a lot of ecchi and is very much downright perverted, but at the same time, and to a good extent because of this, manages to convey emotions incredibly strongly. Aiba over the course of the manga grows tremendously, physically, mentally, and emotionally, while at the same time some core aspects of him, his attachment to Kurumi, never changes much at all. Now that's not to say that their relationship doesn't change, as it builds up incredibly slowly over the course of the manga into something that despite how it seems entrenched in ecchi from the beginning, and wherein any scene out of context may seem kind of disgusting, is something that seems kind of beautiful. Kurumi doesn't quite grow much over the course of the manga, but rather has something she wants in the beginning that she slowly seems to find as Aiba grows, and hence both of them play off each other tremendously well. In a similar sense, Kyouko and Katsu also play off each other incredibly well and grow together over the course of the manga, though it's very much only at the level of the side story. How things would end for Kurumi was obvious from the beginning, and having it hanging over the readers head from the beginning in one sense prevents it from being all that sad. Still, the ending still has an incredibly strong emotional impact. To some degree, I feel they didn't handle it all that well, wherein while in terms of what happens with Kurumi at the end feels like a fitting end to the manga, in terms of how it was told it felt quite messy and somewhat confusing. In general, I liked how the manga didn't explicitly mention a lot of crucial details related to the plot, rather alluding to them strongly and consistently enough over time that the reader just knows, but with the ending that didn't really work because it was the end it felt a bit rushed and didn't really have time to convey things through subtle repetition. Still, despite all that, it still hit pretty hard. How they handled the epilogue I thought was immensely good, in that it quickly showed everything it needed to show for everyone, most notably how Aiba had moved on but hadn't forgotten about what happened in the least, rather that he retained everything he gained and that was how he was proceeding forward. The manga relies pretty strongly on comedy, which for the most part is fine, but due to how much of the manga is dependent on it and how there isn't that much variety it does start feeling like it's dragging on a bit as it goes on. The art was good, in that it was never really beautiful at all, but rather fit in with the tone incredibly well, wherein when it needed to be dirty is was really dirty, where it needed to emphasize comedy it was quite humorous, facial expressions especially, and wherein it was both it used both back to back quite well.