Joonha is a normal, healthy boy of sixteen who has cruised through life without too many problems. Imagine his surprise when a recent trip to the bathroom suddenly reveals that he's not normal at all! With a shriek of "Oh, my God!!!," he finds himself missing, well, something he never thought he could live without. As it turns out, his family is abnormal in the weirdest possible way. After puberty, their chromosomes undergo some kind of mutation, which converts their bodies into the opposite sex!
Was about to get super happy that we were finally winding down the extraneous drama (aka people) and our two leads were coming clean and being adorably angsty.....until that cliffhanger ending with the ex-GF. Knowing kdrama as I do, it was immediately clear some sacrificial emotional bologna that ruins everything was coming.