Yesterday, we reported the release of Super Junior's Yesung's�one minute teaser for an OST from�SBS drama 'Warrior Baek Dong Soo''. A short time ago, Yesung released the full version of the song. Yesung's "For One Day" explores an emotional farewell from a lover. The song touches listeners with the meloncholy expressed in Yesung's voice. Yesung's solo track can be heard on Monday's episode of 'Warrior Baek Dong Soo'. Source: YesungCenter