A yukari shirt with 'mind the gap' on it.
CAUTION! CAUTION! HORRIBLE PUN APPROACHING FAST!Hey, in fact, a shirt with a silhouette of Utsuho and her CAUTION signs around it wouldn't be such a bad idea either.
Yukari reaching 'through' the shirt with gaps.
On safebooru I once saw a pic of Yukari indeed gapping through the site, her gap blending in with the white background of the site. It was in the clever pool, but I can't find it anymore. Maybe it's been moved to danbooru, since Yukari's dress was almost see-through, allowing clear view of her naughty parts.