Sekai de ichiban taisetsu na kimi ga umareta hi
KURISUMASU yori BARENTAIN yori
Nani yori daiji na hi
Kore kara mo ichiban chikaku de iwasete ne

Arittake no ai wo komete omedetou
Nante koto nai mainichi datte
Kimi no hanauta ga kikoetari
GEEMU no naka no teki ni okottari

Ichibyou mo me wo hanashitakunai
Dekakeru chokuzen
Are ga nai toka kore ga nai toka sawagidasu kimi
Shouganai na nante ii nagara

Mitsukete ageru no ga nikka desu
Nanigenaku sugiru hibi no naka de
Kimi no tonari sonna "itsumo" ga
Watashi no koto konnani shiawase ni shite kureru no oh..

Sekai de ichiban taisetsu na kimi ga umareta hi
KURISUMASU yori BARENTAIN yori
Nani yori daiji na hi
Kore kara mo ichiban chikaku de iwasete ne

Arittake no ai wo komete omedetou
Nakitai kurai tsurai toki demo
Kimi to ne issho ni iraretara
Itsunomanika zenbu wasurete

Omoikkiri waratteru'n da
Nandaka itsumo moratte bakari de
Watashi wa nanika agerareteru?
Kimi no koto ippai shiawase ni shitai'n da

Sekai de ichiban taisetsu na kimi ga umareta hi
Kono saki zutto nani ga atte mo
Nani yori daiji da yo
Rainen mo ichiban chikaku de iwasete ne

Umarete kite kurete honto arigatou
Shiwa ga fuetari
Ironna koto wo wasurete shimatte mo kitto
Kono hi dake wa isshou wasurenai

Itsumademo te wo tsunaide mitsumeatte KISU shiyou
Sekai de ichiban taisetsu na kimi ga umareta hi
Kono saki zutto nani ga atte mo
Nani yori daiji dakara

Kore kara mo ichiban chikaku de iwasete ne
Arittake no ai wo komete omedetou
Umarete kite kurete honto ni arigatou