Responses
no. mari is dating his older brother co worker whom she also call oppa.
She and her brother aren't dating. She refers to the men she dates and her brother both as "oppa", hence Junyoung's confusion. It can be used for both your actual older brother and just older men in general as a term of endearment.
She's secretly dating her brother's business associate, but she calls them both "oppa".
mari is the older guys sister, but they’re also dating ?? can somebody explain their relationship please ?