Hi everyone,
Two quick questions. When is it appropriate to call an older person "오빠/형/누나/언니"? Is this something the older person kind of decides, or do you just start using it after a certain level of comfort?
Also, in what cases do you use 오라버니 over 오빠 or 누님 over 누나, for example? Is it all about exact age difference, or is it also dependent on the type of relationship?
Any help would be greatly appreciated!