Title Year Peaks Sales (DL) Album KOR [39] "Flower, Wind and You" (꽃, 바람 그리고 너) (with DIA's Ki Hui-hyeon, Choi Yoo-jung and Kim Chung-ha) 2016 42 KOR: 38,862+[40] Non-album single "You, Who?" (유후) (with Eric Nam) 2017 16 KOR: 191,765+[41]