"W" leading stars Lee Jong Suk and Han Hyo Joo's chemistry is so palpable that some fans believe that there is already a real-life romance brewing between them. In fact, behind-the-scenes of "W" revealed their sweetness again.

Soompi reported that MBC recently shared a sweet video from the filming of a brief scene from one of the episodes of "W". Lee Jong Suk and Han Hyo Joo were reported to be caught flirting on this video again.

In the video, Lee Jong Suk and Han Hyo Joo's characters Kang Chul and Oh Yeon Joo went on a date at a market. After they film one scene when Han Hyoo Joo puts headbands on Lee Jong Suk's head, she teased the 26-year-old actor saying he's blushing. Furthermore, Lee Jong Suk said he was kind of embarrassed for them being cute and flirty at the same time.

To recall, there are behind the scenes videos of the on-screen couple from the hit drama, "W". It was when Lee Jong Suk recorded some narrations for one of the episodes and Han Hyo Joo stayed behind to support him. Moreover, Han Hyo Joo reported to hold Lee Jong Suk's hands to get him back to zone since he was distracted.

Furthermore, the "W" main stars were reported holding each other's hands even while cameras weren't rolling. The incident took place during one of the show's promotional materials.

Though, Lee Jong Suk revealed he is comfortable with Han Hyo Joo and admitted she helped him with the drama, the two haven't confirmed they are dating in real life. Furthemore, reports revealed Lee Jong Suk is romantically involved with "Doctors" Park Shin Hye while Han Hyo Joo is speculated to be dating "Full House" actor Kang Do Han.

Meanwhile, since "W" is nearing to its end with one more episode to go, "MBC" then revealed they will air a special episode right after the sixteenth episode of the hit fantasy drama. Furthermore, writer of "W" Song Jae Jung revealed the scripts from episode 1-15 to the fans just three days before the finale episode in order for fans to review and understand more the story and conclusion of the hit MBC drama.