"My Secret Romance" is continuously topping the TV rating charts due to the lovable, sweet storyline and theme, as well as the perfect chemistry between Sung Hoon and Song Ji Eun. And now, the recent on-set antics between the two Korean idols have been able to gather strength in creating a truck-load of rumors and speculations that something might really be going on between the two.

According to Korea Portal, there are now already a lot of speculations that Sung Hoon and Song Ji Eun might be in a romantic relationship with each other, due to the special connection that they have on the set of "My Secret Romance".

Because of the natural and lovable connection that they show on set, their fans can't help but wish that they are really dating in real life. All of these rumors and speculations regarding their possible romantic relationship started to surface when OCN released behind-the-scenes video clips of the drama series.

One of the shown videos was when Sung Hoon and Song Ji Eun were filming the bathroom accident where Sung Hoon was supposed to carry Song Ji Eun. In the behind-the-scenes video, Song Ji Eun can be seen rehearsing the scene as she lies down on the floor with her bath robe.

And surprisingly, Sung Hoon covered up the legs of Song Ji Eun when the bathrobe accidentally exposed a part of her thighs.

According to another report by Korea Portal, what made the fans giggle is when Sung Hoon jokingly says that he finds the legs of Song Ji Eun gross. Another behind-the-scenes video clip which supports the theory that they are into each other is when Sung Hoon carries Song Ji Eun while running throughout the hotel corridor.

The actor was exhausted because of the scene, which is why Song Ji Eun gave Sung Hoon a lovely shoulder massage. With all of these being said, it is very likely that Sung Hoon and Song Ji Eun might really be in a real secret romantic relationship.