This Man is the debut single album by Jeonghan x Wonwoo,[a] a sub-unit of the South Korean boy band Seventeen.

On May 19, 2024, Pledis Entertainment announced a new Seventeen sub-unit comprising group members Jeonghan and Wonwoo via a logo trailer and a video teaser entitled "The City", revealing news of their upcoming single album This Man.

[4][3] Concept photos of the single album were digitally released and later used as outdoor advertisements across districts Seongsu, Myeongdong, and Gangnam in Seoul, as well as Shibuya in Tokyo.

[6] A themed pop-up store featuring clothing, merchandise, and a photo zone was open from June 18—24 at the Times Square mall in Seoul to commemorate the release of the album.

[10] Inspired by an urban legend that people from all over the world encounter the same mysterious man in their dreams, the album's story was written by Cho Ye-eun, a thriller and horror novelist whose achievements include the Excellence Prize at the 2nd Goldenbough Time Leap Fiction Contest and the Grand Prize at the 4th Kyobo Story Contest.