It's been six years and I didn't even realize. The crowd, stage, and hand lights, it even made the guitar in my hand feels a bit heavier. But why do I still feeling lonely? --- Black Star is a module of Rin and Blue Moon is a modules of Len. Black Star would refer to Blue Moon as 'Blue' and Blue Moon would refer to Black Star as 'Black' --- I wanted to write something for Kagamine concert originally (or not because I got lazy) Then I saw NEGI's short comic of Black Star and Blue Moon, and I could not stop writing.