SG Wannabe are the voices behind "Writing Our Stories" for the 'Chicago Typewriter' OST. 

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"Writing Our Stories", the third track for the tvN drama, is a letter about wanting to love again despite being hurt in the past. It's written, composed, and arranged by Dona, Ricky, and Cuzd, and the MV features scenes between Yoo Ah In and Lim Soo Jung.

Check out SG Wannabe's "Writing Our Stories" MV above!