What makes Rain by Soyou notable?

'Rain' achieved significant commercial success, peaking at number two on the Gaon Digital Chart and illustrating the growing trend of K-pop collaborations. The song's smooth melodies and heartfelt lyrics resonated widely, contributing to Soyou's reputation as a prominent solo artist post-Sistar. In 2017, Soyou was solidifying her solo identity following her successful tenure with Sistar, which disbanded in 2016. 'Rain' marked her first major solo collaboration after Sistar, showcasing her versatility as an artist while featuring EXO's Baekhyun, whose star power added to the song's appeal.