Lady Jane aka HongDae Goddess aka Simon D's girlfriend, features in her first official song with project group "COIN". COIN, and project groups in general, are instrumental groups that borrow the vocal talents of different artists to incorporate into their musical style. The most notable project group is Toy. COIN was formed by Kim Young Ook, a fresh talent who studied at Berkley College of Music. His recent compositions include J's "Lie" and Na Yoon Kwon's "Being Sorry". When Kim Young Ook heard Lady Jane's soft, melodious voice, he wanted to collaborate with her in his project group. The first single, "Coin Toss", borrowed from current pop music and classical jazz, representing Kim Young Ook's interpretation of the two sides of a coin. Tear Candy, the first title, is rhythmically based on Brazilian Bossanova, while Lady Jane's sweet voice lends harmony to this single. Kim Young Ook stated,

"Through the active project Coin, I'll bring fresh and constantly changing style of music."