Sun /Sky is the first ending theme of the series. It was featured from episode 1 to 13 and then was replaced by Archipelago Party Knight.
Sun... Hizashi ni hashaidari
Cloud... Blue ni shizundari
Rain... Wake nanka nai no ni nakeru toki mo...
Moon... Tsuki ni YUME o egaki
Stars... Hoshi ni negai o kake
Sky... Itsumo mitsumete kureru sonna basho o
Naze ka ki zukeba hora
Miageru koto sae mo wasurete iru
Doko made mo hirogaru ao mugen no sekai
Shinjite ita bokura no ano kisetsu zutto
Nanika naku shite shimatta no? Modorenai kana?
Chigau ima mo kono kokoro no naka kitto aru.
Sun... The sunlight frolics
Cloud... Sunk in the blue
Rain.. Even though there's no reason, it's a time to cry...
Moon... Carving my dreams on the moon
Stars... Make a wish on the stars
Sky... That place is always watching over me
For some reason I notice it
I had forgotten to even look up
How vast is that blueness? That endless world
We believed in that season. Always
Have we lost something? Can we restore it?
Even in this changed moment, it's still surely in our hearts.