"1, 2, 3, 4, 1, 2, 3, 4…"

Nekomaru counted as he and Akane did their daily exercises together. They'd found that doing it together was more efficient, fun, and motivating, seeing each other exercise. Though with how the two of them were, neither of them noticed how the movements of their bodies affected…things.

But Hajime did.

As the boy walked by the beach on his way to meet Mahiru and Hiyoko for a…"rendezvous", he spotted the two of them, and immediately stopped in his tracks.

Now, it was hard to miss how well endowed Akane was, especially when she seemed so adamant on being naked at times when it really wasn't appropriate, but…it had never been more apparent as it was right now. Her breasts, confined only by a shirt (since he was almost certain she didn't wear a bra), bounced around wildly as she moved her body up and down, up and down. Hajime couldn't keep his eyes off of them, and was surprised they hadn't come flying out of her thin shirt yet.

But then he glanced over at Nekomaru and…wow…a similar effect was happening, except it was somewhere else. The bulge in his pants, as much as Hajime tried not to stare at it, was also flopping around wildly as the massive man jumped up and down. Hajime was somewhat disgusted but also…intrigued. He was curious how big the man actually was, and so he found himself staring as the bulge bounced around for a while. Eventually, he mentally slapped himself out of it, and continued on his way.

A while later, both Nekomaru and Akane stopped, efficiently warmed up, and were still completely oblivious to what was happening. Nekomaru started thinking about what he was gonna do when Akane spoke up.

"You know, I heard sex is a really great exercise."

That stopped the man in his tracks. Of course, he wasn't stupid, he knew how important something like that was, and how it shouldn't be taken lightly, but did she know that?

"Y-yeah, but…Akane, that's-"

"Oh come on, don't look at me like that. It's not like I haven't done it before." She said, and Nekomaru froze up, but before he could inquire further, she continued. "Of course, I haven't done it with someone as massive as you in order to use it as a good workout, so why not? I'm sure we could push each other to our limits."

"But…are you sure? Having sex is something that requires a lot of trust in your partner." He said, and he could've sworn she blushed.

"I trust you." She said. "So do it with me." Nekomaru took a deep breath, sighed, and then gave her a smile.

"Alright. Let's head back to my cabin, though." He said, and Akane nodded, smiling back.

The two spent the rest of their day trying different sex positions to find the one that would give them the best workout, purely for that purpose, and nothing else.