Lyrics:

Tsumaranai nichijou ni anata wa waratte niji wo egaita
Konna chigau bokura deau hazu mo nai hazu mo nakatta sa

Nakanaitte itte himitsu no yakusoku kienai kizuato
Mamoritai to itte shimaetara kitto raku ni naru keredo

Dou shiyou mo nai hodo ni mou hiki sakarenai
Hontou no kotoba kikitaku mo nai

Kuchizuke daiyamondo wo anata no yubi ni watasou
Katachi no nai yakusoku itsu datte omoi dashite
Shashin ni nokoranai omoi de wo yakitsukete
Futari no yakusoku ga kuchiguse de owaranu you ni

Kuchizuke daiyamondo wo anata no yubi ni watasou
Katachi no nai yakusoku itsu datte omoidashite

Ai shiteru

Tsumaranai nichijou ni anata wa waratte niji wo egaita
Konna chigau bokura deau hazu mo nai hazu mo nakatta sa

Nakanaitte itte himitsu no yakusoku kienai kizuato
Mamoritai to itte shimaetara kitto raku ni naru keredo

Dou shiyou mo nai hodo ni mou hiki sakarenai
Hontou no kotoba kikitaku mo nai

Kuchidzuke daiyamondo wo anata no yubi ni watasou
Katachi no nai yakusoku itsu datte omoidashite
Ai shiteru

Atarashii nichijou to anata ga egaita niji wa mazarazu
Ame ga yanda sora sore demo hikari wo matte iru boku wa

Dou shiyou mo nai hodo ni mou hiki sakarete
Hontou no kotoba shiritaku mo nai

Kuchizuke daiyamondo wo anata no yubi ni watasou
Katachi no nai yakusoku itsu datte omoi dashite
Shashin ni nokoranai omoi de wo yakitsukete
Futari no yakusoku ga kuchiguse de owaranu you ni
Oboetete

Boku dake ni miseru hyoujou wo mou mitsuketanda yo
Kasane awaseta kioku kuzusenai yo

Dou shiyou mo nai hodo ni mou kakusenai kara
Hontou no koto nado ah koreijou kikitaku mo nai yo

Kuchizuke daiyamondo wo anata no yubi ni watasou
Katachi no nai yakusoku itsu datte omoidashite
Shashin ni nokoranai omoi de wo yakitsukete
Futari no yakusoku ga kuchiguse de owaranu you ni
Oboetete

Ugokidasu nichijou ni anata wa namida de niji wo egaita
Futari wa daijoubu kore kara no koto wa nani ni mo iwanai de

Ai shiteru