| 23Angol, Koreai CHAT-SHIRE | |
| 4AMAngol, Koreai Last Fantasy | |
| A DreamerKoreai Growing Up | |
| Beautiful DancerAngol, Japán Can You Hear Me? | |
| Black OutAngol, Koreai Palette | |
| BluemingKoreai, Angol Love Poem | |
| BooKoreai Growing Up | |
| CelebrityAngol, Koreai LILAC | |
| CoinAngol, Koreai LILAC | |
| Every Sweet DayAngol, Koreai Lost and Found | |
| Everything's AlrightAngol, Koreai Last Fantasy | |
| FairytaleAngol, Japán Can You Hear Me? | |
| Feel So GoodAngol, Koreai Lost and Found | |
| FluAngol, Koreai LILAC | |
| Good Day (Japanese version)Japán, Angol | |
| HavanaKoreai Modern Times | |
| Last FantasyKoreai Last Fantasy | |
| Love AttackAngol, Koreai IU...IM | |
| Love PoemAngol, Koreai Love Poem | |
| Love wins allKoreai | |
| Modern TimesKoreai Modern Times | |
| Monday AfternoonAngol, Japán Single | |
| Mother Nature (H₂O)Koreai 강승원 이집 PART.3 - Mother Nature (H₂O) | |
| New WorldAngol, Japán Can You Hear Me? | |
| ObliviateKoreai Modern Times | |
| Rain DropKoreai I□U | |
| Red QueenKoreai CHAT-SHIRE | |
| Shh..Angol, Koreai The Winning | |
| ShopperAngol, Koreai The Winning | |
| strawberry moonAngol, Koreai strawberry moon – single | |
| TeacherKoreai Last Fantasy | |
| The Age Of CathedralsAngol Can You Hear Me? | |
| TruthAngol, Japán Can You Hear Me? | |
| unluckyAngol, Koreai Love Poem | |
| Voice Mail (Korean version)Koreai Modern Times | |
| Voice-MailJapán Can You Hear Me? | |
| あなたと私 (Anata to watashi)Japán | |
| 夢色パティシエール (Yumeshoku pathishie-ru)Japán | |
| 小言 (Kogoto)Japán | |
| 가여워 (Pitiful) (gayeowo)Koreai Growing Up | |
| 가을 아침 (Autumn Morning) (ga-eul achim)Koreai 꽃갈피 2 (A Flower Bookmark II) (2017) | |
| 개여울 (By The Stream) (gaeyeou)Koreai 꽃갈피 2 (A Flower Bookmark II) (2017) | |
| 겨울잠 (Winter Sleep) (gyeouljam)Koreai Pieces | |
| 관객이 될게 (I stan U) (gwangaeg-i doelge)Koreai The Winning | |
| 그 사람 (The Visitor) (geu salam)Angol, Koreai Love Poem | |
| 그 애 참 싫다 (Don't Like Her) (geu ae cham silhda)Koreai Spring Of A Twenty Year Old | |
| 그러는 그대는Koreai | |
| 그렇게 사랑은 (Love Alone) (geuleohge salang-eun)Koreai Palette | |
| 금요일에 만나요 (Friday) (geum-yoil-e mannayo)Koreai Modern Times - Epilogue | |
| 기다려 (Wait) (gidalyeo)Koreai Modern Times | |
| 기차를 타고 (Taking A Train) (gichaleul tago)Koreai IU...IM | |
| 길 잃은 강아지 (A Lost Puppy) (gil ilh-eun gang-aji)Koreai Last Fantasy | |
| 꽃 (Flower) (kkoch)Koreai 꽃갈피 (Flower Bookmark) | |
| 꿈빛 파티시엘Japán | |
| 꿍따리 샤바라 (Boom Ladi Dadi) (kkungttali syabala)Koreai 꽃갈피 (Flower Bookmark) | |
| 나 말고 넷 (Four Without Me) (na malgo nes)Koreai Growing Up | |
| 나만 몰랐던 이야기 (The Story I Didn't Know) (naman mollassdeon iyagi)Koreai REAL+ | |
| 나의 옛날이야기 (My Old Story) (naui yesnal-iyagi)Koreai 꽃갈피 (Flower Bookmark) | |
| 너 (You) (neo)Koreai Pieces | |
| 너랑 나 (You & I) (neolang na)Koreai Last Fantasy | |
| 너의 의미 (Meaning of You) (neoui uimi)Koreai 꽃갈피 (Flower Bookmark) | |
| 누구나 비밀은 있다 (Everybody Has Secrets) (nuguna bimil-eun issda)Koreai Modern Times | |
| 느리게 하는 일 (What I'm Doing Slow) (neulige haneun il )Koreai Real | |
| 돌림노래 (Troll) (dollimnolae)Angol, Koreai LILAC | |
| 두근 두근 데이트 (Heart Beating Date) (dugeun dugeun deiteu)Angol, Koreai IU...IM | |
| 드라마 (Drama) (deulama)Koreai Pieces | |
| 라망 (L'amant) (lamang)Koreai Last Fantasy | |
| 라일락 (LILAC) (laillag)Angol, Koreai LILAC | |
| 러브레터 (Love Letter) (leobeuleteo)Koreai Pieces | |
| 레옹 (Leon)Koreai Yeongdong Highway Music Festival | |
| 마쉬멜로우 (Marshmallow) (maswimellou)Angol, Koreai IU...IM | |
| 마음 (Heart) (ma-eum)Koreai CHAT-SHIRE | |
| 마주보기 (바라보기 그 후) [Face to Face (After Looking At You)] (majubogi (balabogi geu hu))Angol, Koreai Growing Up | |
| 마침표 (Full Stop) (machimpyo)Koreai Palette | |
| 매일 그대와 (Everyday With You) (maeil geudaewa)Koreai 꽃갈피 2 (A Flower Bookmark II) (2017) | |
| 무릎 (Knee) (muleup)Koreai CHAT-SHIRE | |
| 미리 메리 크리스마스 (Merry Christmas Ahead) (mili meli keuliseumaseu)Angol, Koreai Real | |
| 미아 (Lost Child) (mia)Koreai Lost and Found | |
| 미운 오리 (Ugly Duckling) (miun oli)Koreai Lost and Found | |
| 바라보기 (Looking At You) (balabogi)Angol, Koreai Growing Up | |
| 밤편지 (Through the Night) (bampyeonji)Koreai Palette | |
| 벽지무늬 (Wallpaper Patterns) (byeogjimunui)Koreai Last Fantasy | |
| 별을 찾는 아이 (A Child Searching for Stars) (byeol-eul chajneun ai)Koreai Last Fantasy | |
| 복숭아 (Peach) (bogsung-a )Koreai Spring of a Twenty Year Old | |
| 봄 안녕 봄 (Hi Spring Bye) (bom annyeong bom)Koreai LILAC | |
| 분홍신 (The Red Shoes) (bunhongsin)Angol, Koreai Modern Times | |
| 비밀 (Secret) (bimil)Koreai Last Fantasy | |
| 비밀의 화원 (Secret Garden) (bimil-ui hwawon)Koreai 꽃갈피 2 (A Flower Bookmark II) (2017) | |
| 빈 컵 (Empty Cup) (bin keob)Angol, Koreai LILAC | |
| 삐삐 (BBIBBI) (ppippi)Angol, Koreai Single | |
| 삐에로는 우릴 보고 웃지 (Pierrot Laughs At Us) (ppieloneun ulil bogo usji)Koreai 꽃갈피 (Flower Bookmark) | |
| 사랑니 (Wisdom Tooth) (salangni)Koreai Last Fantasy | |
| 사랑이 잘 (Can‘t Love You Anymore) (salang-i jal)Koreai Palette | |
| 사랑이 지나가면 (When Love Passes By) (salang-i jinagamyeon)Koreai 꽃갈피 (Flower Bookmark) | |
| 삼촌 (Uncle) (samchon)Koreai Last Fantasy | |
| 새 신발 (Shoes) (sae sinbal (Shoes))Koreai CHAT-SHIRE | |
| 소격동 (Sogyeokdong)Koreai | |
| 스물셋 (Twenty Three) (seumulses)Angol, Koreai CHAT-SHIRE (EP) (2015) | |
| 시간의 바깥 (Above The Time) (sigan-ui bakkat)Koreai Love Poem | |
| 싫은 날 (Bad Day) (silh-eun nal)Koreai Modern Times | |
| 아라로 (Araro)Koreai | |
| 아이야, 나랑 걷자 (Walk With Me, Girl) (aiya, nalang geodja)Koreai Modern Times | |
| 아이와 나의 바다 (My Sea) (aiwa naui bada)Koreai LILAC | |
| 아침 눈물 (Tear drops in the morning) (achim nunmul)Koreai IU...IM | |
| 안경 (Glasses) (angyeong)Koreai CHAT-SHIRE | |
| 애인이 생기면 하고 싶은 일 (aein-i saeng-gimyeon hago sip-eun il)Koreai 가요대전 2011 | |
| 어젯밤 이야기 (Last Night Story) (eojesbam iyagi)Koreai 꽃갈피 2 (A Flower Bookmark II) (2017) | |
| 어푸 (Ah puh) (eopu)Angol, Koreai LILAC | |
| 어허야 둥기둥기 (Eoheoya Dunggidunggi)Koreai 꽃갈피 (Flower Bookmark) | |
| 에잇 (Eight)Angol, Koreai CD single | |
| 에필로그 (Epilogue) (epillogeu)Koreai LILAC | |
| 여름밤의 꿈 (Dreams in Summer Night) (yeoleumbam-ui kkum)Koreai 꽃갈피 (Flower Bookmark) | |
| 우울시계 (Gloomy Clock) (uulsigye)Koreai Modern Times | |
| 을의 연애 (Love of B) (eul-ui yeon-ae)Koreai Modern Times | |
| 이 지금 (Dlwlrma) (i jigeum)Angol, Koreai Palette | |
| 이게 아닌데 (Not like this) (ige aninde )Koreai Real | |
| 이런 엔딩 (Ending Scene) (ileon ending)Koreai Palette | |
| 이름에게 (Dear Name) (ileum-ege)Koreai Palette | |
| 입술 사이 [50cm (Between the lips)] (ibsul sai)Angol, Koreai Modern Times | |
| 있잖 아 (You Know) (issjanh a)Angol, Koreai Lost and Found | |
| 잊어야 한다는 마음으로 (With the Heart to Forget You)Koreai Cd single | |
| 자장가 (Lullaby) (jajang-ga)Koreai Love Poem | |
| 잔소리 (Nagging) (jansoli)Koreai I□U | |
| 잔혹동화 (Cruel Fairytale) (janhogdonghwa)Angol, Koreai Only I Didn't Know | |
| 잠 못 드는 밤 비는 내리고 (Sleepless Rainy Night) (jam mos deuneun bam bineun naeligo)Koreai 꽃갈피 2 (A Flower Bookmark II) (2017) | |
| 잠자는 숲 속의 왕자 (Sleeping Prince of the Woods) (jamjaneun sup sog-ui wangja)Koreai Last Fantasy | |
| 잼잼 (Jam Jam) (jaemjaem)Angol, Koreai Palette | |
| 정거장 (Next Stop) (jeong-geojang)Koreai Pieces | |
| 제제 (Zezé) (jeje)Koreai CHAT-SHIRE | |
| 졸업하는 날 (Graduation Day) (jol-eobhaneun nal)Koreai Growing Up | |
| 좋은 날 (Good Day) (joh-eun nal)Angol, Koreai Real | |
| 첫 이별 그날 밤 (The night of the first breakup) (cheos ibyeol geunal bam )Koreai Real | |
| 크레파스 (Pastel Crayon) (keulepaseu)Koreai Modern Times - Epilogue | |
| 팔레트 (Palette) (palleteu)Angol, Koreai Palette | |
| 푸르던 (The Shower) (puleudeon)Koreai CHAT-SHIRE | |
| 하루 끝 (Every End of the Day) (seumu sal-ui bom - halu kkeut)Koreai Spring Of A Twenty Year Old | |
| 한낮의 꿈 (Daydream) (hannaj-ui kkum)Koreai Modern Times | |
| 혼자 있는 방 (In A Room Alone) (honja issneun bang )Koreai Real | |
| 홀씨 (Holssi) (holssi)Angol, Koreai The Winning | |
