The dude from the past plays around with Jihan. He fucks him and pretends to be in a relationship but he was dating girls on the side. When Jihan finds out and confronts him the son of a bitch actually pushes him to the ground and tell him sth along the line how stupid he was for ever thinking they were in love. I also saw some scenes of Jin-young's mom threatening Jihan to stay away from his son. I don't know if the dude from past is any of the semes (I doubt), I think it's just that author wants to show how Jihan is hung up on the past go for dudes who look like the trashy ex
The dude from the past plays around with Jihan. He fucks him and pretends to be in a relationship but he was dating girls on the side. When Jihan finds out and confronts him the son of a bitch actually pushes him to the ground and tell him sth along the line how stupid he was for ever thinking they were in love. I also saw some scenes of Jin-young's mom threatening Jihan to stay away from his son. I don't know if the dude from past is any of the semes (I doubt), I think it's just that author wants to show how Jihan is hung up on the past go for dudes who look like the trashy ex