My Beloved Sister is a 2006 South Korean television series starring Song Yun-ah and Kim Sung-soo. It aired on MBC from August 12, 2006 to February 18, 2007 on Saturdays and Sundays at 19:55 for 55 episodes.
Song stars as the titular older sister who must carry the family when the world is pulled out from under her.
The drama epitomized frustration with its portrayal of a braindead female lead whose actions and decisions often questioned the existence of a cerebrum in that skull. The leads consistently made choices that were not only repetitive but also pathetic. Almost every character was repeating the same mistakes and facing the same consequences. A group of monkeys would perform and produce a better result under a shock therapy. The side plots were generally bad, maybe only the ML's brother one was acceptable but the rest were kinda cringe. The drama advertised itself around the bigger sister and her younger siblings (as title suggests too) but the siblings played such a small side role in the story while the love triangle was the main focus. The drama practically ended 6-7 episodes early and the remainder was pure fluff of nothingness. It didn't help its case when the resolution was lame anyway.