Web author Twisted Hilarity's popular story The Last Pure Human features Max, who finds himself centuries in the future on an alien planet after being cryogenically frozen on his way to a colony, Exty Years From Now. To summarise, he finds himself unwillingly 'married' to giant alien Cat-Man Kasan: cue a long, long series of "I hate him. I'm not even gay. I am totally not into his huge hot body. I am not going to lead him on, especially not when he does that sexy smile of his. Nope. Not one bit." Thankfully this grows less prominent as the story goes on.
Although that may actually be a subversion; she's not being "tsundere", she's just sick of them both and their ugly faces, not to mention this whole fruitless kidnapping/rescue thing.
Church from Red vs. Blue probably fits in here somewhere. He's a jerk most of the time, but on occasion shows that he really does care about the rest of his team (and about Tex). The instant he realizes that he's done so, however, back comes the tsuntsun side. Tex is just plain tsuntsun, though. It particularly shows up in this episode when Tex and Church confront O'Malley.
In season 8 his deredere side comes out a bit more. Then again, it's kind of maybe not quite the original Church.
