Sepia ni nado naranai
Tabun zutto kono mama zutto
Mukashi ha yokatta to bonyari iu youna
Otona ni nante naritakunai keredo
Anata to shiriatte kasaneta mainichi ha
Kore kara nani ga okitemo wasurenai kara
Sonna yakusoku wo
Dare mo mina kamisama to kawashite umareta
OH, MY TREASURE mirai wo
Itsumo mitsumetetai kedo
Doushite nano ashita ga
Itakute mienai
OH, MY TREASURE itsuka ha
Konna kimochi no zenbu wo
Kakegaenaku omoeru
Sonna toki ga kuru hazu dakara
Konna ni setsunakute konna ni kuyamu nara
Ano toki motto yasashiku sureba yokatta
Tooi yakusoku wo
Dare mo mina sukoshi dake shinjite wakareru
OH, MY TREASURE jibun de
Ima wo erandekita noni
Doushite nano kotoba ja
Jouzu ni ienai
OH, MY TREASURE itsuka ha
Konna kimochi no zenbu wo
Kakegaenaku omoeru
Sonna toki ga kuru hazu dakara
YOU'RE MY TREASURE anata ha
Zutto watashi no DIAMOND
Omoide yori tashika ni
Kokoro de kirameku
OH, MY TREASURE jidai ga
Machi no keshiki wo kaetemo
Sepia ni nado naranai
Anata to no koto ha
OH, MY TREASURE itsuka ha
Konna kimochi no zenbu wo
Kakegaenaku omoeru
Sonna toki ga kuru hazu dakara