Here is Kyuhyun, Sungmin & Ryeowook (Super Junior) - Biting My Lips (President OST) (FULL AUDIO)
Lyrics at moozikportal.blogspot.com
[Kyuhyun] Sumi chaoreuge ggeutggaji dalrinda
Kalgateun sirin barami gaseumeul ddaeryeodo
[Ryeowook] Sseureojyeo nunmulinalddaen ibseuleul ggaemulgo beotilge
Majimak gieokdoelsaram naega doeltenigga naega doeltenigga (naega doeltenigga)
[Sungmin] Amugeotdo garomakeulsuneun eobseo igijimothal geimirado
[All + Sungmin] Eoduun mirosok hanjum bitcheul chaja jeobeun nalgaereul pyeolchilgeoya
[Kyuhyun] Gabojimothan gileul gandaneungeon duryeoumboda hanbal gidaeapseo
[Ryeowook] jeonghaejin lule makchwogajinana salme jeongdabeun eobseunigga
http://moozikportal.blogspot.com/2010/12/super-junior-biting-my-lips-lyrics.html
[All] Sumi chaoreuge ggeutggaji dalrinda
Kalgateun sirin barami gaseumeul ddaeryeodo
Sseureojyeo nunmulinalddaen ibseuleul ggaemulgo beotilge
Majimak gieokdoelsaram naega doeltenigga (naega doeltenigga)
[Ryeowook] Noreul ggeutggaji jikyeonaeji mothan geuddae naemoseub yongseohaejugetni
[Kyuhyun] Gaseum hankyeone gipi sumgyeodugo haengbokhagireul bileobonda
[All] Sumi chaoreuge ggeutggaji dalrinda
Kalgateun sirin barami gaseumeul ddaeryeodo
Sseureojyeo nunmulinalddaen ibseuleul ggaemulgo beotilge
Majimak gieokdoelsaram naega doeltenigga (naega doeltenigga)
[Ryeowook] Sigyereul dolryeo geuddaero gandamyeon yaksokhae nigyeote namgetdago
[All + Kyuhyun] Jjalbatdeon sarange gildeon geuriume holro namgyeodwoseo mianhae
[All] Ddeugeoun naegaseum meomchuji aneunda
Danhanbeon bbunin isalme modeungeol geoleotda
Dununeun oneulbodadeo dagaol naeileul gidaryeo
Yeongwonhi gieokdoelsaram naega doeltenigga (naega doeltenigga)