YOU SAID:
The cover that made him under cover came with a cover that he could cover himself with to better be under cover.
INTO JAPANESE
彼を覆い隠したカバーには、彼が自分自身を覆い隠すことができるカバーが付いていました。
BACK INTO ENGLISH
The cover that obscured him had a cover that allowed him to obscure himself.
INTO JAPANESE
彼を覆い隠していたカバーには、彼が自分自身を覆い隠すことを可能にするカバーがありました。
BACK INTO ENGLISH
The cover that obscured him had a cover that allowed him to obscure himself.
Well done, yes, well done!