fromis_9 have dropped teaser videos featuring members Lee Seo Yeon and Lee Na Kyung for their upcoming debut with 'To. Heart'!


In each of the beautiful teasers, Lee Seo Yeon and Lee Na Kyung are focused on writing a letter before handing it to fans. 

As previously reported, the 9-member girl group made their pre-debut with "Glass Shoes" after making it to the finals of Mnet's trainee survival show 'Idol School'. They'll now be making their official debut with a mini album 'To. Heart'.

'To. Heart' drops on January 24, so stay tuned!