Hatsune calling Haku Master? All due respects I thought it was like the other way around since Haku is the fake, I mean I love Haku and all but I'm just saying.
No. Caffein the artist often uses Haku to represent himself when depicting interactions with Miku. So in this case, Haku = Caffein = master.
*Ahahaha*Ah... That's why there are so many people in Akiba.Golden Week?But I have nothing to do with that 'cause I'm always in GW and New Year!funny funnyYou have no jobs, master...This is no time to be drunk!