In the 15th episode of “Legend of the Blue Sea” on Thursday, Shim Cheong (Jun Ji-hyun) and Cha Si-a (Shin Hye-sun) showed off their dance moves at a nightclub.

Cha Si-a was the first to arrive. She had a couple of drinks there after the shock of finding out that Heo Jun-jae -- the friend she has feelings for -- is the heir of a wealthy corporation.

(SBS)

Not too long ago, she had also accidentally found out that a house maid she had been treating poorly was actually the mother of Heo who had gone into hiding after a divorce.

A drunk Cha calls Tae-o (Shin Won-ho), one of the housemates of Heo, to join her.

Tae-o turns up with his other housemates Shim and Nam-doo.

Shim wore a purple minidress with a low-cut neckline, and a necklace. Cha had on an equally short black dress, with metal rings adorning the front.

(SBS)

By Lim Jeong-yeo (kaylalim@heraldcorp.com)