This is the opening theme for the whole thirteen episodes of Sola. Sola is a Japanese anime serialized from Naoki Hisaya’s work and was aired from April to June 2007. The song was sung by Aira Yuki and was released in a single maxi under the same name by Lantis last April.

The Sola original soundtrack and image album was released on June 27 and August 8 respectively.

Source: Wikipedia

Anyway, here’s the full version of the song and its lyrics in Japanese [courtesy of AnimeLyrics.com]

Colorless Wind
Aira Yuki
Sola TV Opening Theme

hane ga shiroku hikari mabushiku tondeyuku
kokoro dake nosete hoshii no ni

tsumetai te wo nobasu todokanai… shitteru
dakedo ima furetai kimi ni

natsukashii kaze ni ha ano koro no fune
maboroshi ga omoide wo miseta

“wasurenai” dareka no koe ga setsunaku hibiku
hajimaru yokan ni furuete
“wasuretai” negau jibun ga wakaranai
matteiru yurarenagara yume hitotsu wo

toozakaru hito nara nani mo tsuge ha shinai
kanashimi ha watashi dake no mono

sakasama no kimochi ga sawaideru… shitteta
mune kogasu hitosuji no honoo

kioku ni nagasarete musubarenu mama
nando demo meguru sadame nara

“aimashou” itoshiki hibi no tsudzuki ga mitai
memai ni tomadou ma mo naku
“aieru deshou?” hikareau no ha tsumi desu ka
tomadoi ga sasou toki no hazama he yuku

“wasurenai” dareka no koe ga setsunaku hibku
hajimaru yokan ni furuete
“wasuretai” negau jibun ga wakaranai
matteiru kodoku no naka
“aimashou” itoshiki hibi no tsudzuki ga kowai
memai ni tomadou futari ga
“aieru deshou?” hikareau no ha tsumi desu ka
tomadoi mo keshiteshimau yume hitotsu de