This probably wasn't the first "serious" kdrama I'd ever watched, but honestly after I finished it I really felt like it was. Like all the light, fluffy dramas I'd seen before couldn't compare to the heart-wrenching and gut-twisting feelings this drama gave me. It was amazing. This was not the beginning of my Rain obsession, but it definitely didn't help it. One of my first real revenge-love dramas and still the best.