Me and my mind. I am trying to guess who he ends with by looking at their finger nails. There is a scene in the first few seconds where he back hugs him. This is a spoiler so don't fall for temptation if you want to keep the suspense.
For me, the sexiest scene will always be, when Hua Yong is fixing the clips holding the shirt on Sheng's legs and Sheng is just sitting there on the chair looking at Yong.