
Korean girls call older brother oppa and I guess any man older than them. The seme is her brother and the other oppa is her love. So the uke thought that the seme was her lover. But in reality both are two different person. Lmao I hope I made it clear

Mari is the younger sister of the seme. She’s dating a different man, who she calls oppa too, cause that’s one way women address older men in Korea. The uke has misunderstood the situation, and thinks Mari is dating her brother and that her brother is married (uke still doesn’t know they’re brother and sister though).
the real question for me is?? what is the fucking relationship between Mari and The oppa,isn't he her oppa,and her brother at the same time? i don't understand it at all