also: つやぶみ
noun
A somewhat literary or old-fashioned term for a love letter. In modern Japanese, ラブレター is more common.
彼は彼女に艶文をしたためた。
He wrote a love letter to her.
The common modern term for 'love letter'. 艶文 is more literary and less frequently used.
Compound of 艶 (en, 'charming; glossy') and 文 (bun, 'writing; letter'). The reading つやぶみ uses the kun'yomi of 艶 and the native word 文 (fumi, 'letter').