On the 22nd December, Girls' Generation held a large-scale size concert 'SMTOWN WEEK GIRLS’ GENERATION "Märchen Fantasy"' at Ilsan, Kintex with a theme of fantasy fairy tale. Unexpectedly  they also announced their upcoming comeback teaser. 


The official photos of individual members also be revealed along with their name being mentioned by the girls. At the end of the teaser, the moving Heart Rate also gathered lot of attentions. The fans started guessing their concept after seeing their teaser in delight.

Source: OSEN
Translation: totoropie @TheSoneSource