GFRIEND Yuju posted diary entry from just before her debut on Weverse with a comment "It's clear" on the 17th.

● 2015.1.15 (Thursday) Debut D-1

Tomorrow, for the first time in my life I will make my debut on Music Bank. Today, the song from the first collection "Season of glass" was released to the world, and a lot of contents such as music videos and shooting sites were released.