[2][full citation needed] He initially attended the Sun Moon University, under the journalism major but dropped out.

[2] The album became very popular after receiving praise from many well-known artists, including Seo Taiji and Shin Seung Hun.

Unlike his debut album, It's Real wasn't restricted to R&B and it included different musical elements like pop and hip-hop.

In late 2008, Wheesung has collaborated once again with Lee Hyori who featured as his girlfriend in his music video of "별이 지다.." (Fading Star) in the "With All My Heart and Soul" album.

[citation needed] After the concert, Wheesung planned to stay in Los Angeles for a month to work on his new album with producer Lee Hyun-do.

On June 27 and July 4, Wheesung performed at "Insomnia Concert" and club Le Cercle in LA.

In June 2009, Wheesung changed his label again from Orange Shock to POP/UP Entertainment, which houses stars like JK Kim Dong Wook and group M to M.[7][full citation needed] Wheesung has decided to change his label because former producer, Park Gun Tae, concentrated more on producing and working by himself.

He served 21 months of active service after completing five-week of basic training course at a boot camp in Nonsan, South Chungcheong Province.

[12] On July 11, 2012, Wheesung was granted a 9 nights, 10 days temporary leave from the army to undergo surgery for a herniated disc as well as other medical conditions such as bilateral shoulders dislocation, psoriasis and alopecia.

In 2013, the singer was accused of using propofol from 2011 to early 2013 in various places including dermatology clinics in Gangnam, Seoul.

[17][full citation needed] On April 2, 2020, Wheesung was found again collapsed in a bathroom of a hotel in Gwangjin District, Seoul, with a syringe and a glass bottle containing Etomidate.

[16] In April 2020, ex-TV personality Amy revealed she and a celebrity friend, later confirmed to be Wheesung, partook in recreational propofol use.

[18] While investigating a tip, the police had come to suspect Wheesung of purchasing propofol and sent his case to the prosecution with a recommendation of indictment.