Who reach upon the edge of the world, and complete this song with me.
— Author's comment (Translated by Moonlight)
"Scarlet Drop" is the first original demo song for Yuezheng Ling and is featured in the album Quadimension 3. Luo Tianyi only sings two lines in the song towards the end.
The song tells the story of Ling and how her project as a VOCALOID from 2012 to 2014 was cancelled or dropped and was being forgotten in time. She struggled through this and was eventually reborn in fire.
In September 2015, this song was featured at the V-master concert held at the Century City New International Convention & Exhibition Center.
"The V-master Concert" was a 3D VOCALOID concert featuring the Vsinger VOCALOIDs. This concert marked Yuezheng Ling's first live concert appearance. It was held at the Century City New International Convention & Exhibition Center. The songs featured in the concert are "Scarlet Drop", "Pink Lemon", "Chángjiāng 7 Hào Chāo Méng Tègōng Duì", Yībàn Yībàn, FEEL YOUR DREAM, and Pǔtōng DISCO.