Boobs and Butt²
In the future everybody does the boobs and butt pose and that's why Karin went back in time to shoot Junta with the DNA bullet because he carries the boobs and butt gene... coming to a Netflix live action adaptation near you!
(English and Italian DVD Covers of DNA² vol. 1, Us Manga Corps Video)
Edit: I added the Italian DVD Cover just because it was the one I could find at highest resolution so it's easier to see what Karin's pose is