http://rocaca.com/manga/the_palette_of_12_secret_colors/ <-- Anyone who wants to read it online
(Though it needs to be cleaned, its still better than nothing)

First time I saw this manga was from a library, and I fell in love with the story. It's like a fantasy but at the same time it doesn't go overboard with the plot and problems.

Story: 10- Listen y'all, it a cute love story. It has progression, personal preference, and it has them funny moments.
Art: 8- Im in love with Guell...Cello will not have him...
Character: 10- All the characters are cute, especially Yoyo and Olga
Enjoyment: 10- I mean, I love it so much that I had an urge at 1am to read the whole 6 volumes
Overall: 9- Cause I gave my sleep just to search for this manga online...cause the library has to be closed at 1 in the morning...

Read it! This manga is so..underrated because it is not on any major manga sites..is just sad...thus provided the link. ^^