A quick conversation first

Makoto looked at the cum-covered girl, his boner still raging.

"...Makoto?" Sayaka asked. "Why are you just staring..."

He said nothing as he kneeled down on the bathroom floor and spread her legs. Her pussy and asshole leaked with other people's cum.

Makoto nervously unbuckled his pants, letting his cock free.

"There we go," Sayaka said, smiling.

"S-Sayaka," Makoto started. "Are you comfortable being a-"

"Wow, you actually want to talk to me?" She asked. "Why?"

"What do you mean, why?"

"Why're you talking to a cumtoilet?"

"Weren't you talking to me earlier? Why were you talking to me if you didn't expect me to respond?"

"It helps get people in the mood," Sayaka said, smiling and blushing. "Most people just use me and get out of here. What changed?"

"Huh?"

"Well, you usually just use me and walk off, never giving me a moment's notice... what changed?"

"...Usually?"

"Yeah. You're in here almost every day."

"Well... I..." Makoto replied, taken aback for words. So in this reality, he was expected to already use and disregard Sayaka, and he's already done it multiple times before...

"I just thought about you, and what you've been through." Makoto replied.

"That doesn't make much sense," Sayaka said. "Do you think about what your fleshlight's been through? Do you think about what dildos have been through?"

"Well, you're a person..." Makoto trailed.

"Huh?" Sayaka asked, taken aback and confused. "I'm a cumtoilet, through and through. That's all I am, and all I'll ever be."

Then, Makoto heard a banging from the door.

"Dude." Hiro's voice came from behind the stall door. "Are you talking to the cumtoilet?"

"H-Huh?" Makoto asked, taken aback by the question. "Uhh... yeah?"

"Can you just hurry up and get out of there?" Hiro asked. "I'm about to bust and I don't like waiting!"

Sayaka smiled and spread her legs, spreading herself open with her left hand, and pointing down to her pussy with her right. "Are you gonna use me or not?"