The plot wasn't the most original, but the way it was written, and just the smooth character development was great. I didn't even realize the change in Ren until Haruko pointed it out. Everything seamlessly connects.
The art is amazing, and the characters are really good-looking, which is great... I'm not sure that to say about the sound, since most of it's in Japanese. The English speaking parts do have an accent, but you can still understand it, and subtitles are also provided. Regarding the quality of it, it is very good, but I'm no expert on that.
Overall, this was a really great show. There were no hardcore yaoi moments (ep. 9 could have turned into one, though), but there was fan service, kissing most episodes, and just affection in general.
Probably not the first yaoi you should see, if you want to venture into this genre. This also features incest, since the two main characters are technically brothers.
