O Milagre (2013)

For one, both characters are named Tae Gong Shil. Both dramas pertain to ghosts, and a character seeing ghosts at that. Well, not to mention the obvious point that it's a parody off of this show and The heirs.

This mini series have bits and pieces of The Heirs. Even both the main leads have same name as The heirs. Even the OST.