Lovely art piece! I see that you answered someone saying he's blackmailing her. My guess was that it was them in the picture, and she had forgotten about him or something! lol Well, I just finished watching the anime "Amnesia" not too long ago, and I guess my mind's been pretty creative since.
Cute! But I don't get what's going on; is he blackmailing her or maybe she didn't know he somehow took that picture? I don't get the idea, but his seriousness in confronting her, and her reaction is funny.