It was sweet. A light read that is majorly focused on art rather than BL. It was a subtle build up of progress in their relationship. I can see why the rating isn't that high, it may be lackluster for readers that are used to the BL aspect being smacked right in your face. I personally liked it. I have interest in art so that may be why. I liked the subtly too. It's not a re-read for me though, hence why I rated it 3 stars. Still a nice read though. Give it a read if you like art or want to learn about traditional Japanese art.
Ruriiro de Kimi wo Kazatte