Taewoon and IONE will be returning with "VACCINE".

On August 9, Million Market released the first teaser image of Taewoon and IONE's collaboration single "VACCINE" on their official Twitter page.

Labelmates Taewoon and IONE drew eyes for their amazing chemistry in the teaser photo. Taewoon and IONE are both wearing green suits of different print patterns, and they look directly at the camera with easygoing vibes while showing off their refreshing charms. In addition, the title of the song "VACCINE" and the release date and time "2021.08.16 6PM (KST)" were written at the bottom of the teaser. In the right bottom corner of the image, the phrase "Woo Taewoon X IONE Feat. ???" raised curiosity on the unrevealed artist who would also be featuring on their upcoming single.

"VACCINE" will be released through various online music sites on August 16th at 6PM KST.