when i was 10 omoi wo noto ni shirushi hajime ta kanashimi nayami mosubete (i wrote down everything) when i was 12 tonikaku yononaka ni ikatte ta dareka ni sakebi wo kii te hoshi katta want you to understand when i was 13 yume hamousugu teno todoku tokoroniatta hisshi datta when i was 14 ironna monowo gisei nishitakedosorede zenzen yokatta nando tonaku nagashi ta namida mo sugi sare basorehasorehasubeteii omoide otona no kaidan wo mune hatte nobotte ru (good-bye 10 dai ) oh good-bye my teenage when i was 15 kazoku to hanare tehitoride yume te wo tsukamu tameni iki te iku to kime ta when i was 16 umakuikikakete dame ninarikaketanowo oboe teru ano toki watashi kitto ochi tetara owari dattakamotte omotte ru when i was 17 sukoshi zutsusubeteumakuitteiruyouna mainichi and i've been happy when i was 18 nagai kan watashi ga hoshi kattanohakoredatte kanji teta yoake nando tonaku nagashi ta namida mo sugi sare basorehasorehasubeteii omoide otona no kaidan wo mune hatte nobotte ru (good-bye 10 dai ) oh good-bye my teenage oh and i am 19 mou 10 dai ga owa ru naritakatta tei^n ninareterutte mune wo hatte ie ru good-bye good-bye my teenage nando tonaku nagashi ta namida mo sugi sare basorehasorehasubeteii omoide otona no kaidan wo mune hatte nobotte ru (good-bye 10 dai ) oh good-bye my teenage