Stolen from here. This song is also known as Mada Ashita.

(Haruhi: Tobira wo akeru to, soko wa–)
itsudatte kimi no koto wo bokura wa koko de matteru kara
ya na koto ga atta no nara bokura ni hanashi wo kikasete yo

sakki made naite ita (nakanai de) kimi no kanashii kao mo (sugu ni)
hora bokura nara itsu no mani egao ni kaeru
(Honey: Egao ni kaeru!)

mata ashita! hohoenda kimi ni aeru you ni
sumi kitta aozora ukabu kumo no you ni
mune ippai hi no hikari abite aruki dasou
boku to
(Tamaki: Ii ne.
Haruhi: Tanoshii desu ne!
Tamaki: Kore ga shomin no uta ka!)

kudaranai joudan datte kimi wa warau kamo shirenai keredo
tada kimi no yorokobu kao ga bokura wa itsumo mitai dake nanda

sakki made futte ita (daijoubu) doshaburi amagumo mo (sugu ni)
hora bokura nara warai tobashite aruite ikeru
(Mori: Doushita, Mitsukuni.
Honey: Ahaha, aruite ikeru!)

mata ashita! hohoenda kimi ni aeru you ni
wa ni natte tsunaida te to te no nukumori wo
itsumademo wasurenai you ni aruki dasou boku to

kenka shite surechigau toki datte (donna toki datte)
kimi ni aeta koto ni koukai wa nai kara
(Tamaki: Yukou!)

mata ashita! hohoenda kimi ni aeru you ni
sumi kitta aozora ukabu kumo no you ni
mune ippai hi no hikari abite aruki dasou

mata ashita! hohoenda kimi ni aeru you ni
wa ni natte tsunaida te to te no nukumori wo
itsumademo wasurenai you ni aruki dasou
(Haruhi: Senpai!
Tamaki: Kora omaera, Haruhi kara hanarero!
Twins: Yada yo!
Honey: Tanoshii ne!
Kyouya: Omaera na…
Honey: Haru-chan!
Haruhi: Yare yare.
Kyouya: Maa, ii ka.
Tamaki: Haruhi~!
Haruhi: Mata ashita!)

mata ashita! hohoenda kimi ni aeru you ni
sumi kitta aozora ukabu kumo no you ni
mune ippai hi no hikari abite aruki dasou
boku to

See You Tomorrow!

(Haruhi: When I opened the door, there was–)
We’re always here waiting for you, so
if something’s troubling you, let us hear about it

Even your sad face (don’t worry), which was crying earlier (soon),
Look, we can change it to a smile before you know it
(Honey: Change it to a smile!)

See you tomorrow! So we can see you smiling
So like a cloud floating in the perfectly clear blue sky
Bask in the light of day with all your might, and start walking
With me
(Tamaki: Nice.
Haruhi: Isn’t this fun?
Tamaki: So this is a commoner song!)

You might laugh like it’s a trivial joke
But we just always want to see your happy face

Even with downpour and storm clouds (don’t worry) looming over us until now (soon)
Look, we can laugh it off and keep walking
(Mori: Is something wrong, Mitsukuni.
Honey: Ahaha, keep walking!)

See you tomorrow! So we can see you smiling,
So we’ll never forget the warmth
from when we joined hand-to-hand in a circle, start walking with me

No matter if we fight and disagree (no matter what happens)
There will never be regrets about meeting you
(Tamaki: Let’s go!)

See you tomorrow! So we can see you smiling
So like a cloud floating in the perfectly clear blue sky
Bask in the light of day with all your might, and start walking

See you tomorrow! So we can see you smiling
So we’ll never forget the warmth
from when we joined hand-to-hand in a circle, start walking
(Haruhi: Senpai!
Tamaki: Hey you guys, get away from Haruhi!
Twins: No way!
Honey: This is fun!
Kyouya: You guys…
Honey: Haru-chan!
Haruhi: Geeze.
Kyouya: Oh, well.
Tamaki: Haruhi~!
Haruhi: See you tomorrow!)

See you tomorrow! So we can see you smiling
So like a cloud floating in the perfectly clear blue sky
Bask in the light of day with all your might, and start walking
With me

And if you want to know who sings where

(Haruhi: Tobira wo akeru to, soko wa–)
Tamaki: itsudatte kimi no koto wo bokura wa koko de matteru kara
ya na koto ga atta no nara bokura ni hanashi wo kikasete yo

Twins: sakki made
Hikaru: naite ita (nakanai de)
Kaoru: kimi no kanashii kao mo (sugu ni)

Mori: hora bokura nara itsu no mani egao ni kaeru
(Honey: Egao ni kaeru!)

Everyone but Haruhi: mata ashita! hohoenda kimi ni aeru you ni
sumi kitta aozora ukabu kumo no you ni
mune ippai hi no hikari abite aruki dasou
boku to
(Tamaki: Ii ne.
Haruhi: Tanoshii desu ne!
Tamaki: Kore ga shomin no uta ka!)

Kyouya: kudaranai joudan datte kimi wa warau kamo shirenai keredo
tada kimi no yorokobu kao ga bokura wa itsumo mitai dake nanda

Twins: sakki made
Hikaru: futte ita (daijoubu)
Kaoru: doshaburi amagumo mo (sugu ni)

Mori: hora bokura nara warai tobashite aruite ikeru
(Mori: Doushita, Mitsukuni.
Honey: Ahaha, aruite ikeru!)

Everyone but Haruhi: mata ashita! hohoenda kimi ni aeru you ni
wa ni natte tsunaida te to te no nukumori wo
itsumademo wasurenai you ni aruki dasou boku to

Hikaru: kenka shite surechigau toki datte (donna toki datte)

Tamaki: kimi ni aeta koto ni koukai wa nai kara
(Tamaki: Yukou!)

Everyone but Haruhi: mata ashita! hohoenda kimi ni aeru you ni
sumi kitta aozora ukabu kumo no you ni
mune ippai hi no hikari abite aruki dasou

mata ashita! hohoenda kimi ni aeru you ni
wa ni natte tsunaida te to te no nukumori wo
itsumademo wasurenai you ni aruki dasou

mata ashita! hohoenda kimi ni aeru you ni
sumi kitta aozora ukabu kumo no you ni
mune ippai hi no hikari abite aruki dasou
boku to

(Haruhi: Senpai!
Tamaki: Kora omaera, Haruhi kara hanarero!
Twins: Yada yo!
Honey: Tanoshii ne!
Kyouya: Omaera na…
Honey: Haru-chan!
Haruhi: Yare yare.
Kyouya: Maa, ii ka.
Tamaki: Haruhi~!
Haruhi: Mata ashita!)