RusAus ( Russia x Austria) Au Idea.
What if those two are like symphony orchestra players like Roderich is a Pianist and Cello Player , And Nicholas is a full time percussionist, also playing piano as well . Both of them take their job seriously , resulting them being Orchestra losers and buds. And there Happy together , uwu / Fluff!
Just for the Angst
Nicholas has a lung and heart condition, and the stress gets to him. As one of his preforming shows he faints on the floor and has a hard time breathing. And Roderich stop immediately and goes helps Nicholas as quickly as he can.
( oh look)