YOU SAID:

Underwear goes on the outside of your pants

INTO JAPANESE

下着はズボンの外側に

BACK INTO ENGLISH

underwear on the outside of the pants

INTO JAPANESE

ズボンの外側の下着

BACK INTO ENGLISH

underwear outside trousers

INTO JAPANESE

ズボンの外側の下着

BACK INTO ENGLISH

underwear outside trousers