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 resumed his musical activities after a five-month absence and subsequently collaborated with a new artist, Sook Hee, on the digital duet "Foolish Heart" in May 2010.