[talk] It looks like Wooseok is the last singer for the Grand Prince's Wife OST.

The final vocalist for the Grand Prince's Wife OST is Wooseok~~

Parallel Lines sung by Wooseok in the final ending of Episode 10

The song came out... ㅠㅠ Ah... As soon as I heard it, Wooseok-nim

I recognized it as a voice the moment I heard it.