YOU SAID:

Behind your behind lie the lies of someone's underwear under your sheets.

INTO JAPANESE

あなたの後ろには、あなたのシーツの下に誰かの下着の嘘があります。

BACK INTO ENGLISH

Behind you lies in someone's underwear under your sheets.

INTO JAPANESE

あなたの後ろは、あなたのシーツの下に誰かの下着に横たわっています。

BACK INTO ENGLISH

Behind you lies in someone's underwear under your sheets.