"Is Who" is the third digital single by Minseo. It was released on June 20, 2018 as the third release of her 4-part debut project "The Diary of Youth".
Track list
- "Is Who" - 3:34
- "Growing Up (알지도 못하면서)" - 3:08
- "The Grand Dreams (멋진 꿈)" - 4:28
- "The Grand Dreams (멋진 꿈) (Acoustic Ver.)" - 4:15