YOU SAID:
Some day will be the day that i will become you
INTO JAPANESE
ある日は私があなたになる日になります
BACK INTO ENGLISH
One day will be the day when I will be yours
INTO JAPANESE
私はあなたのものになる日が一日になります
BACK INTO ENGLISH
It will be the day when I will be yours
INTO JAPANESE
私があなたのものになる日になります
BACK INTO ENGLISH
It will be the day when I will be yours
That didn't even make that much sense in English.