English translation (let me know if I got anything wrong):
じゃ~ん
Ta-dah!
ベルト獲ったど~!!
I won the belt~!!
(へっへ~)
(heh-heh~)
(ドンッ)
(boom)
---
さぁ~
そんじゃチャンピオンになったことだし
Come on~
That makes me the champion
約束おぼえてるよね?
You remember our agreement, don't you?
今からアンタの初めてを奪ってあげるからね~
So now I get to take YOUR first time from you~
(ピクン・・・)
(twitch)
---
そこでホテルとってあるから・・・
So, we have to get a hotel...
ああ~
やっぱもう我慢できないかも
Aah~
I don't think I can hold back any longer.
ここで犯しちゃおっかな~
Maybe I'll just fuck you right here~
(ムク ムク)
(throb throb)