I heard she's singing the OST for '21st Century Grand Prince's Wife' herself! Hahaha

It was announced on the 11th that the final OST for 'The Grand Prince's Wife,' featuring vocals by Byun Woo-suk, will be officially released on the 15th. This track is a 'hidden card' not included in the existing OST lineup; it was surprisingly revealed via a trailer immediately after the broadcast on the 9th, so I'm really looking forward to it! Hahaha.