Play dumb

Katsuragi, quickly realizing she was blowing her cover in the bushes, tried her best to silence the noises she was making in hopes her classmate would miraculously drop her suspicion. They hadn't worked, but Yagyuu decided to let her hold her breath for several minutes until she thought her bad attempt at stealth actually worked before closing in to interrogate her.

K: "Phew. It would have been a shame if I got caught right at the start. I almost got exposed back there."

Y: "What's this about shame and getting exposed?" Yagyuu said in a deadpan tone, and who was now crouched over, crawling in the same bush with her.

The shock nearly drove Katsuragi to pass out, but she managed to keep herself together. At this point she knew she had to get back to that scroll and go further with it now that she was convinced of its legitimacy. However, she'd need to lay low until she got the chance to make it there. The faculty wouldn't be a problem because of the common sense changes she made, but her classmates would be an issue.

Y: "Why are you so surprised? This is the same bush you always hide in when you want to perv on girls."

K: (Trying to regain her composure) "Err... Umm... Y-Yeah! That's it. This is just my normal routine."

Y: "Something seems different about this time though."

K: "Uhhh no, that's ridiculous. I'm just on the lookout for skirts in the wind like I always am."

Y: "There hasn't been any wind today."

K: "Uhmmm well that's strange since I always check the weather forecast for this. It said there would be wind. I'm sure it will come soon."

Y: "Then what was that outburst just then? It's pretty obvious you're hiding something else. Probably something to do with how I lost my bra. So what's the trick?"

Katsuragi struggled to think of a comeback and stalled for a response after this last comment. At that moment, the wind had finally arrived, blowing on Yagyuu's skirt, and she noticed it felt colder than usual. While she was quick on the uptake realizing something happened with her bra, she still hadn't been aware something also happened to the underwear on her lower half until just then.

She would learn to appreciate the moment of silence Kat gave her as well since it allowed her to finally hear the sound of the crowd that had gathered behind her. With her ass sticking out of the bush she crawled into, it seemed a decent gathering of boys from the school were appreciating the view Yagyuu was unknowingly giving them all.

K: "Uhh... Y-Yeah there's the wind I was talking about..."

Yagyuu retreated from the bush with a beet red face. The boys quickly dispersed, and Katsuragi took this opportunity to attempt an escape. This was the first time Yagyuu saw her outside of the bush and it was only then that she had noticed Katsuragi's own attire. While it was pretty typical for her to cheat the dress code to reveal some extra cleavage through her uniform (not to mention her shinobi transformation attire which wouldn't fasten even one button), there always was at least some underwear hidden under her loose clothing. Today, however, there was nothing holding her breasts in place, and in her rush to escape the bush, for a moment they had slipped out from her blouse before Katsuragi caught them.

Y: "W-Wait! Why aren't you..."

K: "Uhh, sorry gotta go!"

Y: "Hey, we're not done yet! Don't think something like this will work as a distracti--"

(): "Good moooorning, Yagyuu-chaaan!"

Just then, Yagyuu's fellow first-year classmate and love interest, Hibari, greeted her. Being the ditzy type, Hibari had no awareness that anything had happened to her underwear and was just acting like her normal bubbly self even as the wind blew on her skirt and her breasts freely bounced around as she skipped along.

Yagyuu almost immediately lost focus of what she was doing from this sight. Her heart rate was already high from the embarrassment she suffered earlier, so it took all of her strength to not pass out from stimulation. She ended up forgetting much about what happened before this.