Yall are making so long but good points bom and taesung dont look alike and it explains how they are nothing like brothers deeper into the story like when taesungs mom is talking to boms mom and says "i wish one of them were a girl so they could get married" so even before bom was taken in by taesungs mom even they shipped it and taesung most definetly had a crush on bom before his parents death and wanted bom as a lover not a brother.
R.i.p bato. Back to my origins.