YOU SAID:

Whoops, I *accidentally* killed my arch enemy!

INTO JAPANESE

おお、私は*誤って*私のアーチ敵を殺した！

BACK INTO ENGLISH

Oh, I accidentally killed my arch enemy!

INTO JAPANESE

ああ、私は誤って私のアーチ敵を殺した！

BACK INTO ENGLISH

Oh, I accidentally killed my arch enemy!