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.
Setelah absen lima bulan, Hwanhee merilis duet digital berjudul "바보 가슴" ("Foolish Heart") dengan penyanyi pendatang baru wanita, 숙희 "Hee Sook" pada Mei 2010.