Yoon Kye Sang is a smiling grandma's boy in BTS photos for 'Full Sun'

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Jung Sae Ro (Yoon Kye Sang) follows his con-artist dad overseas but ends up living with his grandmother Soon Ok (Kim Young Ok) and shows a special affection for her. When the cameras weren't rolling, Yoon Kye Sang couldn't be any sweeter to his onscreen grandma with his smile and hugs full of love.

A rep commented, "Sae Ro and Soon Ok's story will melt viewers' hearts... Sae Ro, who is an innocent and naive fool with love for his grandmother, turns cold, so please look forward to the episodes that unravel with him and Soon Ok."

This drama centers around Jung Sae Ro (Yoon Kye Sang), who lost his whole family to a murderer. Although he initially dreamed of studying foreign affairs, with his family's death, he becomes involved in the dealing of jewels. A love story will unfold between him and jewelry designer Han Young Won (Han Ji Hye), who previously lost her fiance.

'Full Sun's premiere has been pushed back a week later due to the '2014 Winter Olympics' to February 17!