YOU SAID:

the guy gasped and exclaimed he "had never seen it before" in a suspicious manor.

INTO JAPANESE

男はあえぎ、疑わしい邸宅で「これまで見たことがない」と叫んだ。

BACK INTO ENGLISH

The man gasped and yelled, "I've never seen one before" at the questionable mansion.

INTO JAPANESE

怪しげな屋敷で男は「見たことない」と息を切らして叫んだ。

BACK INTO ENGLISH

In a dubious mansion, the man gasped and shouted, "I've never seen it before."

INTO JAPANESE

怪しげな屋敷で、男は息を切らしながら「見たことない」と叫んだ。

BACK INTO ENGLISH

In a dubious mansion, the man gasped and shouted, "I've never seen it before."