English:

From here the night begins
Without flashy, romantic words
I have loved, I have been loved
Help me stop this

Lucky(1), mysterious, ambiguous were the words
Let’s spin disco ball(2) HIGH
P.A.R.T.Y with you
Won’t you come
Well, dance

Come into me, I don’t want to wake up
Who’s the one who got me wet?
Refusing(3) love, shaking hips
Stain the night with you Carnival

The ones that begin from this
Sweet nights of indecency
Lucky, mysterious, ambiguous were the words
Make me throw caution to the wind(4) JIVE

My heart is shaking so hard
Don’t take your eyes off from me
Won’t start the night without you
Won’t you come
Well, dance

Come into me, I don’t want to wake up
Who was the one who got me wet?

Candles illuminate these thoughts of mine
Were you the one who melted?

Trembling while whispering Carnival that feels like nothing
I am the one who broke?

Do not divert those eyes
Look only at me
Refusing love
So always
Stain the night with you Carnival

P.A.R.T.Y with you
P.A.R.T.Y with you
P.A.R.T.Y with you
Won’t you come
Well, let’s dance
Romaji:

Koko kara hajimaru yoru
Inasena kotoba wa nashi yo
Aishita aisareteta
Sonna no yamete kure

Saiwai kaikai aimai datta kotoba
Mawasou ze “mirror ball” HIGH
P.A.R.T.Y with you
Won’t you come
Saa odore

Atashi no naka ni kite sametakunai kara
Nurashita no wa dare?
Ai wo kette koshi wo futte
Yoru ni somaru kimi to Carnival

Kore kara hajimaru no wa
Midara de amai yoru
Saiwai kaikai aimai datta kotoba
Risei wo hagase JIVE

My heart is shaking so hard
Don’t take your eyes off from me
Won’t start the night without you
Won’t you come
Saa odore

Atashi no naka ni kite sametakunai kara
Nurashita no wa dare?

Boku no kono omoi wo “candle” ga terasu
Tokashita no wa kimi?

Yure nagara sasayaku kanjou kaimu no Carnival
Kowashita no wa boku?

Sono me wo sorasanaide
Boku dake wo mite yo
Ai wo kette
Dakara zutto
Yoru ni somaru kimi to Carnival

P.A.R.T.Y with you
P.A.R.T.Y with you
P.A.R.T.Y with you
Won’t you come
Saa odorou
Kanji:

此処から 始まる夜
いなせな 言葉は無しよ
愛した 愛されてた
そんなのやめてくれ

幸い怪々曖昧だった言葉
回そうぜミラーボール HIGH
P.A.R.T.Y with you
Won’t you come
さぁ 踊れ

あたしの中にきて 覚めたくないから
濡らしたのは誰？
愛を蹴って 腰を降って
夜に染まる君とCarnival

これから始まるのは
淫らで 甘い夜
幸い怪々曖昧だった言葉
理性を剥がせ JIVE

My heart is shaking so hard
Don’t take your eyes off from me
Won’t start the night without you
Won’t you come
さぁ 踊れ

あたしの中にきて 覚めたくないから
濡らしたのは誰？

僕のこの思いを キャンドルが照らす
溶かしたのは君？

揺れながら囁く 感情皆無のCarnival
壊したのは僕？

その眼を逸らさないで
僕だけを見てよ
愛を蹴って
だからずっと
夜に染まる君とCarnival

P.A.R.T.Y with you
P.A.R.T.Y with you
P.A.R.T.Y with you
Won’t you come
さぁ　踊ろう

Notes:
1) いなせな
2) ミラーボール mirror ball, which is a disco ball
3) 蹴って kette literally mean kicking, but as slang can mean refusing
4) 理性を剥がせ “risei o hagase” roughly translates to “peel off the ability to reason”
I chose to replace this with an equivalent English expression.