On January 6,2015, it was revealed that the group is set to debut on January 15 with a EP titled "Season of Glass", with it's promotional track composed by Lee Giyongbae.
The group is set to debut on January 15 with a EP titled "Season of Glass". This was with it's promotional track. This was what it was revealed on January 6,2015. This is composed by Lee Giyongbae. It's promotional track This.