It was the first ever K drama I ever watched, n trust me it made me fall in love with K dramas. It is also considered as the Saddest K drama ever n it actually is. But, it has such a beautiful story. They teach u the real definition of love. It has a very sad yet satisfying ending, n I'd i is a must watch at least once in ur lifetime. But, do not forget to keep ur tissues with u while watching!