Yes it is and the black haired one at the end is also him, looks like he really is or was a bad boy and was only acting (went as far as changing his look)
Wait, what? o_O I thought he, may be, shared his contacts with Seol-a, and the image we see at the end of the chapter is a photoshopped pic of his (reference to chapter 9, how boys also fix their photos these days). Whatever, I wonder what did the two talked about... Did he say sorry? Did he confess? Did he ask to go out properly? Did he say anything else... Oh.. So difficult waiting for the TL.
last edited at May 17, 2015 5:41PM