i think what will happen is that while jaeyi expects that ideum will be swayed by the brother, ideum will prove to jaeyi obliviously or reassure him that he will and still choose jaeyi and then jaeyi will realize that and be like "omg ur the only person that chose me yada yada" and then he fall inlove with ideum and then he will seriously pursue ideum and in the end will become official. THE END
i think what will happen is that while jaeyi expects that ideum will be swayed by the brother, ideum will prove to jaeyi obliviously or reassure him that he will and still choose jaeyi and then jaeyi will realize that and be like "omg ur the only person that chose me yada yada" and then he fall inlove with ideum and then he will seriously pursue ideum and in the end will become official. THE END