I think Xin lu. I think this was probably the only time he was the bottom, like we could see he was acting in control, he was on top of Ilay, i think he thought like "if I'm doing this, I'll be the one leading" or something like that.
because apparently he just did it so Ilay could "stay away"from Tae-il. Because he knows that Ilay wants Tae-il too.