Parallel (stylized in all caps) is the fifth extended play (EP) by South Korean girl group GFriend. The EP was released digitally and physically by Source Music on August 1, 2017 and distributed by LOEN Entertainment. The album contains eight songs, including the single "Love Whisper", and one instrumental track. It has sold over 60,000 physical copies as of August 2017. The extended play was re-released on September 13 under the title Rainbow with the single "Summer Rain" and a bonus track of the same name.