Because of the tension and conflict brought about by recent developments in the story, Kim Tan steps up his game as he gives Cha Eun Sang a back hug in recent stills for the drama.

Cha Eun Sang wanders around the house to look for Kim Tan, when suddenly, he gives her an unexpected back hug. According to a staff member from the drama, "Watching the two of them together gave me chills from head to toe. They definitely have an explosive chemistry."

Park Shin Hye shared, "Even on set, they call me Eun Sang instead of Shin Hye so I definitely feel the responsibility of playing the character. I work hard to express her feelings of wanting to be with Kim Tan despite the odds, and I hope everyone looks forward to their romance."

In other news, many fans wondered about the new song that was released during a hallway scene with Park Shin Hye and Lee Min Ho. It was revealed that Park Shin Hye was the one who sang the song entitles "Story", and it reflects a girl's feelings while pining for a love she can't have.

It is not the first time she has sung an OST for a drama she is casted in, as her voice was heard for theme songs in the dramas "Flower Boy Next Door", "You're Beautiful" and "Heartstrings".

Catch the next episode of "The Heirs" on SBS at 10PM KST.