Doki Doki Majo Shinpan Duo is risqué in its essence, we're not surprised that the boxart would also be rather ... bold. The blue bar that wraps its way around the cover lets perusers of the box see through the girls' clothes, hence the assaulted looks on their faces.
The girl on the left used quick reflexes to cover herself up, while the girl on the right only had a sliver of indecency exposed. The girl in the middle, though? Not so lucky -- not even because her breasts were displayed for gaming consumers to see, but because she has no nipples. Maybe she's related to the guys in Duel Love? Or, maybe that's how you go about proving she's a witch.
In all seriousness, we don't expect SNK to put nipples on the front of the box. Maybe they should have gone with a different design, though, so that the girls wouldn't look like ... well, freaks. Still, we know most guys aren't too picky when it comes to this kind of thing, and will enjoy the opportunity to stylus-poke the ladies of the game nonetheless. Oh, and the little pointing hand in the bottom right says "touch," lest your forget your task.