The theme is performed by the band Czecho No Republic.
Hadaka no mama de ii Kodomo-mitai yume ga mitai Oto ni awashite Utau kara kimi mo dou? Kanashimu yori waratte'tai yo Korogatteiku fuantei na michi o Tatakau yori tanoshindemiyou Tadayo tte'ru fuantei na hibi o YEAH!!!!!!! Kibou no nami ni notte Hora mae o muite Yattekanakucha Oh Oh Oh Oh Oh Oh Yeah!!!!!!!
Why don't we just stay naked? Seeking dreams just like children I'm gonna sing along So why don't you try? I'd rather smile than be sad Let the bumpy roads just roll by I'd rather have fun than fight Let the unsteady days just float by YEAH!!!!!!! Set off on the waves of hope Always keep looking ahead Just give it a try Oh Oh Oh Oh Oh Oh Yeah!!!!!!!
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