On September 3, mood teaser video for GFRIEND's 'SUMMER RAIN' was posted on the group's official YouTube Channel.
In the teaser video, members of GFRIEND are standing in a pouring rain with a melody of piano in the background.
![GFRIEND Drops Mood Teaser Video for 'SUMMER RAIN'](https://img.sbs.co.kr/newimg/news/20170904/201089894_700.jpg)
![GFRIEND Drops Mood Teaser Video for 'SUMMER RAIN'](https://img.sbs.co.kr/newimg/news/20170904/201089896_700.jpg)
(Credit= '여자친구 GFRIEND OFFICIAL' YouTube, 'GFRDofficial' Twitter)
(SBS Star)