After mentally calling out to Ruby for the entire morning, Riko's "voice" may have finally gotten through to the girl currently wearing her. In the middle of first period, Ruby asked to be excused to use the restroom. Entering the girl's bathroom and finding a stall, Ruby lowered her skirt to her ankles and began to do the same with her pretty pink panties.
"Ruby-chan...!!"
"P-Pigi!! R-Riko-chan!? W-where are you? Are you in the next stall over...?" Ruby squealed, nearly peeing herself in fright.
"Umm, n-no, I'm not... Can you hear me okay?"
"Yeah... but your voice is all echo-y... like it's inside my head... What's going on?"
"Just uhh... use the bathroom first, I don't want to make you hold it for longer. I could tell you had to go all morning..." Riko said with a hushed tone.
"How could she tell I had to go potty all morning? I-I don't even remember seeing her..." Ruby wondered, lowering her panties to her ankles and sitting down on the toilet.
Little did Ruby know that Riko was pressed up against her tight ass and vagina all morning, so any slight bodily shifts were very much apparent to her. Riko could sense Ruby's inner thighs twitching and the area just below her clitoris trembling from holding her pee in for the past two hours. The thin layer of crotch and ass sweat that Riko had soaked up was enough of a dead giveaway that Ruby was struggling to hold it in.
Riko patiently listened to Ruby release her bodily waste, wipe her privates, and flush the toilet. Ruby lifted her panties and skirt back up, but didn't leave the stall just yet.
"So what's going on, Riko-chan...?" Ruby innocently asked.
"You might want to sit back down for this... I-I can hardly believe it myself, but... I woke up this morning as your panties... The ones you're wearing right now, Ruby-chan..." Riko ashamedly admitted. She was happy to finally reveal to Ruby what has happened, but she was terribly embarrassed all the same.
Ruby stood for a moment before her legs wobbled, forcing her to sit back on the toilet and process this information. It hardly seemed real, was it just a prank? But that did explain why Ruby felt like she was being watched all morning, and why she can hear Riko's voice in her head...
How does Ruby respond?