The opening theme of Card Captor Sakura, by Gumi. One of my personal favorite songs.

I tried to translate the lyrics to the best of my poor Japanese abilities; when in doubt, I made a guess. Excuse any inaccuracies.

aitai na
aenai na
setsunai na
kono kimochi
ienai no
iitai no
chansu nogashite bakari

I want to see you
I can't see you
This sad feeling
I can't tell you
I want to tell you
My chance slipped away

datte datte tsubasa hiroge futari de
sora o marason yume o yunizon shitai

So, so, let's both of us spread our wings
I want to sky marathon, dream in unison with you

hora Catch You Catch You Catch Me Catch Me matte!
kotchi o muite suki da to itte
sou Nice to Meet You Good to See You kitto
watashi no omoi anata no haato ni tonde tonde tonde yuke
ma - yo - wa - na - i!

Look! Catch You Catch You Catch Me Catch Me stop!
Turn over here and tell me 'I love you'
Yes, Nice to Meet You Good to See You definitely
Let my feeling in your heart fly fly fly let's go!
I - won't - lose - my - way!

tama ni ne nakunatchau karada no batterii
anata no egao de itsumo juuden mantan pawaa bakuhatsu shichae

Every so often my body's battery has run out
Your smiling face always charges up my power in a flash

onegai onegai mazu wa otomodachi kara
waratte mitsumete tanoshii mainichi ni shitai

I beg you, I beg you, at least because we're friends
I want us to laugh, gaze at each other, enjoy ourselves every day

hora Catch You Catch You Catch Me Catch Me zettai
unmei datte oniai datte
sou Nice to Meet You Good to See You kitto
dare ni mo makenai anata o sekai de ichiban ichiban ichiban ichiban
ko - i - shi - te - ru!

Look! Catch You Catch You Catch Me Catch Me definitely!
When it's destiny, when there's a well-matched couple
Yes, Nice to Meet You Good to See You definitely
We won't lose to anybody, in the entire world I'm the most the most the most the most
I'm - in - love - with - you!

(repeat of both parts with "Catch You Catch You Catch Me Catch Me")