Kakumaoh lurked behind the bleachers at the side of the gym, red eyes taking in the room. There weren't any classes here at the moment, but he knew that some of the girls sometimes used it during their spare time for exercise, sports practice, or... other activities. He'd decided to see if anyone showed up who looked like they were worthy of his attention, either now or in the future. So far, however, it had been a complete waste of time. He'd give it until the next class bell, then he'd abandon it as a bad idea if no-one worth it had come in by then.

Being late to class as she was, just arriving in the lockerroom as the other girls were showering, the coach said to change into her gym uniform and run 20 laps to make up for the time she missed. As the other girls were leaving, Natsumi changed into her gym clothes, not wearing a bra or panties because they were uncomfortable, with the shorts stopping right above the bottom of her ass and hugging right against her pussy, the fabric rubbing her as she changed, and the small shirt stretching to contain her fabulous breasts, the fabric stretched so far as to stop just below her breasts which showed her strong stomach. "Ahh, this uniform is so tiny." she said as she walked into the gym to start her laps, beginning to run, her breasts straining against the fabric of her shirt with each step.

Well, this was definitely an improvement. He watched the girl run laps around the room, her prominent chest clearly unrestrained by any bra. A second look as she passed near his hiding place showed that she wore no underwear at all, her shorts leaving little to the imagination.

The fact she was running laps helped him deal with a difficulty he hadn't thought of when he'd come here. He didn't want to be interrupted, but hadn't planned how he'd lock the doors without his target noticing him. As it was, however, he could easily make dashes out from cover to a door, lock it, and get back to cover before she was looking in the right direction to see him. By the time she'd finished seven laps, he'd locked all the doors except one directly across the room from the bleachers. I'll let her finish a couple more laps, grab her, and lock the last door afterwards. Dealing with one door while holding a struggling plaything shouldn't be too hard.

As Natsumi finished her tenth lap she thought to herself "10 down, 10 to go." Due to her shorts being so small and rubbing her pussy a small wet spot was forming on her shorts showing that her pussy was starting to become wet.

Kakumaoh waited until the girl passed him again, then used his tentacles to snare her from behind and drag her to him as he came out of his hiding place. Noticing the wet spot on her shorts, he commented, "Seems you're rather worked up. We'll have to do something about that as soon as I make sure we're not interrupted." That said, he walked towards the unlocked door, three arms and six tentacles holding the girl.

As she finished another lap, the wet spot on her shorts continuing to grow, Natsumi was suddenly grabbed by many tentacles "Hey, Let me go whatever you are!" she said wriggling in their grasp although her struggles just caused her breasts to bounce, threatening to spill out of her shirt, and her shorts to rub against her pussy increasing her arousal and the spot on her shorts that smelled of the musk of her sex.

As the girl struggled, Kakumaoh moved his tentacles so that she was held by her wrists, ankles, upper arms and thighs. Two of his hands moved to fondle her breasts while a third began to fondle her wet pussy through her shorts.

"Hey, Let me go whatever you are!"

As he locked the door with his free hand, the hand on her cunt pressed in slightly. "Down here seems to be sending a different message. Your body, at least, is honest about what you want."

As he fondled her breasts Natsumi's nipples started to harden from the expert stimulation of the beast and she rocked her hips to rub her wet pussy against his hand. "Aah" she moaned, her body betraying her true thoughts to the beast who was likely going to fuck her senseless.

The girl seemed to have given in to her body's desires already. This seemed like it would be more enjoyable than he'd expected; usually, his victims' actions were dominated by fear or anger at first, not lust. This would be something he'd only experienced once before, long before he'd arrived here.

"Yes. Don't fight it," he growled as he raised her shirt to free her breasts. He moved the hand on her shorts under their waistband, then continued rubbing her vagina.

"Ahh" Natsumi moaned as he slipped his hand into her shorts to rub her pussy, slick with her juices, and he then released her breasts with their pierced nipples from the prison of their small gym shirt.

He pinched each of her nipples between two fingers, massaging the nubs to erection. His serpentine tongue ran up the side of her neck to her ear while one of the fingers on her pussy began to work its way between her nether lips.

"You really want this, don't you?" he asked as he shifted her slightly so she could feel the tip of his hard cock pressing against her through her shorts.

"Ahhhh, I want it!" Natsumi moaned as he rubbed her sensitive nipples to erection and slipped one of his fingers into her dripping folds.

Using his free hand he pulled her shorts down, exposing her wet sex. A little additional maneuvering of his tentacles and the shorts were almost completely removed, left hanging around one ankle. The tip of his cock pressed against her nether lips, taunting her with how close it was to giving her what she desired. His hold on her, meanwhile, limited her movement enough to prevent her from getting relief before he was ready to give it to her.

"You'll get that one once you've satisfied this one enough," he said as a large tentacle thrust up, its tip pointed at her mouth.

Taking the tentacle into her mouth Natsumi began to suck on it while running her tongue around the tip and down the length that fit inside her mouth, eager to please the beast.

The girl certainly seemed eager to please. Kakumaoh withdrew the tentacles holding her arms and ankles, figuring that she wasn't likely to fight him any more. The tentacle in her mouth began to slide back and forth as his cock rubbed against the entrance to her cunt, the tip occasionally poking between her nether lips.