Hi, I'm looking for this story where Dean and Cas are boyfriends. Dean's a musician touring with his band and Castiel has heart problems that keep him at home. Dean sleeps around when on tour and Cas is aware. Dean comes back home from touring and sleeps with someone in their town so Castiel tells him that he puts up with Dean sleeping around when on tour but not when he's home.

Cas is really, really sick, has to have an oxygen tank with him at all times. I'm not sure but I think maybe Bobby was Cas' dad? (Not sure about the last bit).

I do remember that Sam and Jo are the same age and Dean and Cas go to their HS graduation. Also, I think Jo might be Cas' sister (?)

Thanks for the help, guys!