Jang Eunsung (장은성), best known by her stage name Summer Soul (썸머소울), is an independent singer-songwriter based in South Korea.

She is known for her soothing and enchanting voice and versatile music. She made her solo debut on March 30, 2018, with the digital single “How Beautiful” and has released several albums since. She has earned credits on songs by other K-R&B and Indie artists.