Hotaru No Hikari is a song originally sang by Ikimono Gakari. It is sang by Nakamine Yumi in a flashback in chapter 1.
Lyrics[]
Please note that the words in bold were sang in the series
Sha la la... itsuka kitto
Boku wa te ni surunda
Hakanaki mune ni sotto
Hikari moete yuke
Aitaku naru no shoutou
Naki taku naru no junjou
Natsu no hintobikonda
Hotaru wa kae ra nai
Anata wa nani mo iwazu
Kuchizuke o nokoshite
Kizutsu ku mama una zui nare
Kanashii hodo inochi yurameite ita
Sha la la... itsuka kitto
Boku wa te ni surunda
Hakanaki mune ni sotto
Hikari moete yuke
Sha la la... itoshiki hito
Anata mo miete iru no
Mamayui tsuki ga sotto
Ashita o tera shite
Tsuyoku tsuyoku kagayaite...
Kaze ni fukare ni shoutou Hageshiku naru kokoroni Gagu re sora omoidega
Matayasa shiku komoru Muchuyude kake da shitara Uemareru kiga shita Omoru ku nama Teo nabasuyo Setsuna hodo inochi yurameite yuku
Shalala... bokuwa zuto Utai tsuzu keteikuyo Furueru mune ni soto Hikari moete yuke
  Shalala... itoshi ki hito Anatani todokume yori Hakenai sora ni soto Omoi tsugora sete
Tsuyoku tsuyoku... kimigashite
Shalala itsuka kito Hotaru wa moetsuki Chite kieyuku Mune ni soto Yume o kagayaite
Shalala... itsoshikihito Anata mo sora hini ne Kimareku natsu ni soto Negai o kesagete
Shalala... Itsuka kito Boku wa teni surunda Hakanaki mune ni soto Hikari moete yuke
Shalala... Itoshi ki hito Anata mo mieteiruno Mamayui tsuki ga soto Ashita o terashite
Tsuyoku tsuyoku kagayaite
Anata wa nani mo iwazu Kuchizuke o nokoshite Kizutsu ku mama una zui nare Kanashii hodo inochi yurameite ita
Sha la la... itsuka kitto Boku wa te ni surunda Hakanaki mune ni sotto Hikari moete yuke
Sha la la... itoshiki hito Anata mo miete iru no Mamayui tsuki ga sotto Ashita o tera shite
Tsuyoku tsuyoku kagayaite...
Trivia[]
- This song had been made as a Naruto Shippuden Opening.