NO SPOILERS - I was very surprised by this manga because I thought it would be a completely different story. I was surprised several more times while reading this manga... Great characters, amazing graphics, the story was quite thoughtful and nice. After all, I can say that 'Sign' is one of the respite manga for reading.
I recommend this manga to all yaoi and romantic fans. I hope to see Yohan in anime someday and finally hear his magic voice > . <