You know what I never understood with this chapter? The kid seems to be obsessed by her to the point where he is stalking and only drawing her, I mean, his sketchbook is full of drawings of only her, but at the end he suddenly draws other girls. I know it's the classic joke end, but still... It simply doesn't fit his character...
...Heh, that ending.
He just couldn't be satisfied with just her modelling for him, even after she had sex with him?
He's certainly a greedy fellow. Makes me wonder what she plans to do to him...