Disclaimer: Me no own.
Courfeyrac's knowledge of German opera is astonishingly extensive, and when Enjolras asks him about this one day, he blushes, ducks his head, and refuses to answer, all very unlike him.
Later that night, when he's trying to fall asleep, he remembers.
He was at Jehan's one night, cooking an Italian dish that he couldn't pronounce because it was his boyfriend's favorite, when he heard the act two finale from Die Fledermaus coming from the shower. He smiled and hummed along; it was one of Jehan's favorites. When Jehan got out of the shower, a towel wrapped torturously low around his waist and his long dishwater curls a tangled mess, he crossed to his bedroom, singing an aria from Wagner's Ring Cycle. Jehan was always singing German opera, and it might have bothered Courfeyrac if it wasn't just so damn pretty, and if Jehan wasn't just so damn cute.
Courfeyrac smiles at this memory, rolls over onto his stomach, and finally drifts off to sleep, imagining that Jehan is sleeping beside him like he used to.