Whee In, a member of MAMAMOO, has a sweet, unique voice, technique, and sensibility. She is famous for her sensuous stage manners. In April 2018, she released her first solo album “Magnolia”, And the title track “EASY” is an R&B hip-hop song that combines rhythmic melodies with her delicate techniques and charming tones to enhance the perfection of the song. She also showed off her versatility by performing sophisticated and soft performances as can be seen in the music video. In September 2019, she released her second solo album "soar", creating a completely different atmosphere from her first solo album. Through the title song "Good bye", which has a lonely atmosphere of autumn, she showed her delicate vocals and topped the domestic music charts by drawing sympathy from the public. In addition to her solo album, She has continued various activities participating in other artists’ album and drama OSTs.