(SBS)[3] He continued to pursue his acting career by participating in a 2008 drama "사랑해" ("I Love You") alongside actor Ahn Jae Wook.

In December 2009, Hwanhee signed an exclusive acting contract with KEYEAST Co., Ltd (previously known as Boundaries of Forest Entertainment "BOF").

[4] KEYEAST will work with Hwanhee's current recording label, H-Entercom to manage his future acting, advertising, media publicity activities.

After 10 years of performing with Brian as Fly to the Sky, Hwanhee made his comeback as a solo artiste on MBC Music Core on 24 October 2009.

[7] After a hiatus of five months, Hwanhee released a digital duet titled "바보가슴" ("Foolish Heart") with female newcomer singer, 숙희 "Sook Hee" in May 2010.

Hwanhee also sang "바람이 되어서라도" ("Even Becoming Wind"), the OST for the highly anticipated Korean war[vague] drama, Road No.

"내가 더 아플게" ("I Will Hurt More"), a digital single written by Hwanhee was released in July 2010 and it quickly climbed to top of various Korean online music sites.

Hwanhee was cast in a MBC daily drama, "Stormy Lovers" (previously known as Love is stronger than Death).

The music video of the title track "죽을 것만 같아" features actor Lee Jang-woo, who is his cousin as well.

He served as a public service worker for 23 months after receiving four weeks of basic training at the Nonsan military camp in South Chungcheong Province.