Girls' Generation member Taeyeon will be singing an OST for the SBS drama, "That Winter the Wind Blows" and will be released online on March 13.

The song was first played in the 9th episode and gained much attention. Her OST will be released online on many music sites such as Melon, Olleh Music and more.

This OST, "And...One," is the main theme song for Jo In Sung and Song Hye Kyo's sad love story. Taeyeon's pure voice matches well and expresses the lyrics perfectly.

This song was produced by singer Kangta, who is also the OST producer for this drama.

On the other hand, Girls' Generation is currently holding their arena tour in Japan.