YOU SAID:
But if he's the last one I kiss
INTO JAPANESE
でももし彼が最後にキスするなら
BACK INTO ENGLISH
But if he kisses me at the end
INTO JAPANESE
でも最後に彼が私にキスしてくれたら
BACK INTO ENGLISH
But if he kisses me at the end
That didn't even make that much sense in English.