noun
secret story; untold episode
Refers to a story or episode that is not widely known, often with historical or personal significance. Common in titles like 歴史の秘話 or 皇室の秘話.
この本は戦国時代の秘話を集めたものです。
This book is a collection of secret stories from the Warring States period.
彼は家族にしか話していない秘話を語った。
He told a secret story that he had only shared with his family.