The girls made a fast comeback after ''Love Whisper'' with 5th mini repackage album 'Rainbow'. 

The new release came near the fall season, however, the title track is titled ''Summer Rain''. Regarding this, G-Friend explained, "Many people are curious as to why the title is 'Summer Rain' when fall is coming."

They continued, "'Summer Rain' is a song looking back at the memories from the summer so it's a perfect song to listen to in autumn."

SinB added, "We prepared the repackage album while in promotions for 'Love Whisper'. We didn't know the album will be released 3 weeks later.'' Yuju also said, "I wanted to talk about it so bad. It was so hard to control myself (from talking about it)."

Have you listened to ''Summer Rain'' yet?