Translation

恋愛関係 / 不倫 / 情事

Meaning

A romantic or sexual relationship between two people, often one that is kept secret or is outside of a marriage.

Examples

• Their secret love affair lasted for over three years before anyone in the office found out.
  彼らの秘密の恋愛関係は、職場の誰かにバレるまで3年以上続いた。
• The tabloid newspaper published scandalous details about the senator's long-term love affair.
  タブロイド紙が、上院議員の長期にわたる不倫関係についてのスキャンダラスな詳細を報じた。