The reason you might think the plot is familiar is because this beautiful little drama was the start of all the romantic comedies to follow in the kdrama universe. It's a classic and not to be missed.
Actually this was one of the first ones I watched and it's the one which taught me that "sarangheo" means I love you ... there's a really epic scene that still rings in my ears but I won't go into any details so as not to spoil it.
Please don't be turned away by the cliches and give this one a try!