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After breakfast Jaune quickly jotted down, "Weiss will make an excuse to go to the nearest unoccupied room, then strip naked, unaware of Jaune's presence"

Jaune made his way to the nearest empty room, being one of the classrooms.

Then he just... waited.

Soon his thoughts were immediately ensnared by Weiss when he thought of getting with someone because of his new powers. Something about her small breasts, nice, round ass, and nice but can also be a little bit bitchy personality (This is what most would call weiss’ personality at this time) was just so enticing for the purpose of testing the limits with this book and he’ll be getting more than just a quick look at her breasts.

Shortly after writing in the book, the door to the room opened and Weiss stepped inside. She closed the door behind her, seeming unaware Jaune was even there, and she began to disrobe.

She took her sleeve jacket (i don't know what it’s really called and every time i look online it changes) off as she stepped out of her boots. She reached down, lacing her thumbs into the tops of her socks and flinging them off into her boots. She grabbed the bottom of her thigh-length strapless dress and lifted it all the way over her head, dropping it into her jacket (Thing), leaving her in only her underwear.

Time seemed to slow as Jaune watched her hands reach below her and grab her panties, letting it slowly drag them down to the floor, fully revealing Weiss's ass and pussy to him.

She stood in the pile of clothes, before frantically looking around, seeming to be concerned by her sudden nudity.

Jaune needed to begin his experimentation soon, otherwise she'd redress and leave.