FTISLAND的告白相关歌词主要包含以下内容，分中韩对照和音译两种形式呈现：
一、中文对照版（完整歌词）
主歌部分
- "现在向你告白我的心，只有上天知道的我的心"
- "宝贵的一点点珍惜我的真心，不说流泪，走过回忆"
- "如果不是你，就没有今天的我"
- "那个初次见到你时的我，散漫又年轻的我"
- "留意到我的改变，相信我的话，等待中那些时间"
- "有时候我会不小心让你伤心，但每次你都没有责怪"
- "你微笑的话，我便得到了力量"
- "为了你每天都付出更多的努力"
- "直到死亡的瞬间也记着，我曾说过吗？我爱你"
副歌部分
- "我那炽热的心盛装着今天的告白，永远会不忘记你"
二、音译版（部分歌词）
主歌部分
- "F.T告白"
- "哈弄妈你内妈啊密达"
- "索囧哈妈kiong嘛gi"
- "i jen nae mam go baeg-hab ni da"
- "so jung han man keum a kkyeo on na ui jin sim-eul"
- "mal ha lyeo ni nun mul nab ni da"
- "geu dae a ni myeon eobs-eoss-eul o neul-ib ni da"
- "eo seol peu go tto eo lyeoss jyo"
- "ji kyeo bwa dal lan nae mal-eul mid go"
- "gi da lyeo jun si gan deul"
- "ttae lon nae sil su lo ma-eum a peu ge haess jyo"
- "mae beon nal tas ha ji anh go"
- "gwaen chanh-a gwaen chanh-a us-eu myeo"
- "你微笑的话，我便得到了力量"
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