Song lyrics Nakushita kotoba by Little By Little (Naruto)

Kono ryoute ni kakaete iru mono toki no shizuku
Sotto nigirishimete wasureta kioku nakushita kotoba

Hitotsu hitotsu omoidaseba subete wakatte ita ki ga shite ita no ni
Iroaseta kotoba wa boku no sugu soba ni oite atta

Kotae no denai yoru to hitohira no nukumori to haruka kanata no akogare to
Tada sore dake wo kurikaeshi boku wa ikite iru

Kono ryoute ni kakaete iru mono toki no shizuku
Sotto nigirishimete wasureta kioku nakushita kotoba

Anata ga omou koto wo sameru koto naku temoto ni tsukamitai no ni
"Hito" daru bokutachi wa sono kimochi wo wakachi aenai mama

Kotoba ga hanatsu imi wo tatoe no nai omoi wo kotaeru koto no nai kanjou wo
Mitsumeaeba tsutawaru koto ga dekitara ii no ni na

Kono ryoute ni kakaete iru mono toki no shizuku
Sotto nigirishimete wasureta kioku nakushita kotoba

Kono omoi wa mune ni shimatte okou
Taken from AlbumSongAndLyrics.com
"Nakushite shimatta..."