the bts video starts with Park Shin Hye teasing the director's mannerisms/facial expressions...
(he has shoulder length hair) he would fix his hair on both sides, look at something while one hand is over his forehead and so on...
she's a "prankster" or "mood maker" in the set. One time, they were by the pool side... George was not suppose to get in the pool but look at Shinhye's hand push him in...
Shinhye braiding the director's hair, her manager Jun was there
btw... has anyone seen PSH's manager Jun in her recent events?