The image of Suho alone in an achromatic space appears in the mood sampler video and teaser image posted on March 28th through EXO's various social media accounts, heightening interest in the new album. On April 4th, 'Grey Suit' will be launched.

Suho's second mini-album, 'Grey Suit,' is set to be published on April 4 and features six songs with the topic of 'time.' Suho's soft vocals and delicate singing strike the ears on the title song, 'Grey Suit,' a progressive rock genre song that harmonises with a lyrical band sound and a dynamic string line.

Suho brought attractiveness to the words by sensually describing feelings that became increasingly colorful through the person he encountered again after the empty grey period that seemed to have ceased.

On February 15, 2012, Suho was unveiled as EXO's ninth member. With him as its leader, the group made their debut in April 2012 with the extended play 'Mama.' He was a frequent cast member on the KBS variety show 'Fluttering India' in April 2015, where they visited a few locations in Mumbai, India. Suho made his big screen debut in the independent film 'One Way Trip,' which premiered at the 20th Busan International Film Festival in March 2016. He was confirmed to star in the web drama 'How Are U Bread' in April 2016.

Suho made his comeback to the small screen in May 2018 with the South Korean translation of the 2012 Japanese drama 'Rich Man, Poor Woman,' in which he played the founder of an IT company (portrayed by Shun Oguri in the original). Suho also starred in the webtoon adaptation 'Student A,' which was released in June 2018. Suho played Gwynplaine, a pure figure with a monster-like face, in the musical 'The Man Who Laughs' from July to August 2018.