I've been searching for this song on youtube since it was released and only found the cover version. I never thought it will be released on the official channel.
Romaji Lyrics kaketeiku se o miokuru haruka tōku kasunde kieru nakenai mama otona ni naru ayumi mo itsuka tometeshimau tada umarete tada ushinatte soredemo mada tsuzuiteiru hoshi no hikari sae todokanai toshite mo kun no te o toru kinō wa kanata ashita wa hirakareta itsuka sono saki e hanareteiku kage ga nobiru kuroku nijimu watashi o yondeiru nageite mo modorenainara ayumi wa itsuka mōichido tadashi sa datte machigai datte hitoshiku tada tsuzuiteiku ā tokoyo yori kakuri yo o yōkō yori gekkō o kotoba yori riyū o hontō o oshiete hoshi no hikari sae todokanai toshite mo kun no te o toru kinō wa kanata ashita wa hirakareta itsuka wakarudeshō kitto sono saki e sono saki e sono saki e
Kakete iku se o miokuru haruka tōku kasunde kieru nakenai mama otonaninaru ayumi mo itsuka tomete shimau tada umarete tada ushinatte sore demo mada tsudzuite iru hoshi no hikari sae todokanai to shite mo kimi no te o toru kinō wa kanata ashita wa hiraka reta itsuka sonosakihe hanarete iku kage ga nobiru kuroku nijimu watashiwoyonde iru nageite mo modorenainara ayumi wa itsuka mōichido tadashi-sa datte machigai datte hitoshiku tada tsudzuite iku ā tokoyo yori kakuri yo o yōkō yori gekkō o kotoba yori riyū o hontō o oshiete hoshi no hikari sae todokanai to shite mo kimi no te o toru kinō wa kanata ashita wa hiraka reta itsuka wakarudeshou kitto sonosakihe sonosakihe sonosakihe