Shizuka wins.

Immediately, Kurumu started licking at Moka's clit while Shizuka took Tsukane's cock into her mouth, moaning as she quickly started bobbing her head, eager to get him off. Her tail swayed languidly as she moved to fondly his balls with her hand.

Kurumu of course kept licking at Moka's clitoris as she fingered her pussy. Moka moaned and bucked her hips, before groping at her own boobs through her uniform. "That's amazing Kurumu, keep going..." she cooed, and Kurumu upped the intensity.

However, Shizuka, purring, wasn't giving up easily, and bobbed her head faster, using her rough tongue on Tsukane's shaft even as it was in her mouth. Tsukane was squirming, and before long, he was pulsing. "Ah, I'm about to cum!" he gasped out, before moaning as his newly sweetened seed filled Shizuka's mouth.

A few seconds afterwards, Moka cried out and spasmed from Kurumu's work, arching her back. As she laid back, recovering, Shizuka pulled off and swallowed Tsukane's seed. "Yummy," she purred.

"Darn, I lost," Kurumu whined.

"Hard to believe. Aren't you supposed to be a Succubus?" Inner Moka remarked, emerging for a moment to mock Kurumu. "You're supposed to be the best at sex, what happened?"

"Hey, bite me! Nekos are good rivals when it comes to oral because of those tongues, plus, I'm more experienced giving pleasure to boys than girls!" Kurumu protested.

"So... Is there a prize for winning?" Shizuka asked, looking at Tsukane intently... At least he assumed so. It was hard to tell with those eyes seemingly always closed... How the heck did she see with those things anyway?