生まれたのは何のため？-Metal Dolls I- (Umareta no wa Nan no Tame? -Metal Dolls I-)

For What Purpose Was I Born? (Metal Dolls I) is a song sung by Gumi Megpoid and Rin Kagamine. It is the one-hundred-and-forty-fourth track in Other Vocaloid Songs 12: Mostly Rin Volume 2 and the two-hundred-and-thirty-seventh track in Other Vocaloid Songs 15: Mostly Gumi Volume 2.