Nagito was not expecting to see Chiaki when he decided to go to the beach, dressed in her tight swimsuit, practicing laps in the more shallow water offshore. What he also wasn't expecting was the giant wave that suddenly appeared, something no one had seen since waking up here. Before Nagito could cry out, the wave caught up to Chiaki, and enveloped her. Nagito ran to come save her, but she was soon spit out onto the sand, face down. Nagito felt his cheeks flush, and he stopped as he found himself staring at the girl's slightly plump, pale ass.

"Ow." She said simply, and raised her head out of the sand, before she looked up, dazed, at Nagito, who was still staring at the girl's butt. Of course, he couldn't help his hormones, and his dick instantly became hard at the beautiful sight, and Chiaki's cheeks reddened. She quickly got to her feet, her bare breasts bouncing around, drawing Nagito's attention and exciting him further. He only caught a glimpse of them and between her legs before she covered them with her hands, looking cute with the blush and pout on her face.

"Hey." Nagito said, his eyes still locked onto her chest, and a cute mole on her right breast.

"H-hey." Chiaki said, looking as if she wanted to be anywhere except in that moment.

"So, what are you doing? Or rather, what were you doing, before the wave washed your swimsuit away so rudely?" Nagito asked, and Chiaki blushed deeper at the reminder of her nudity.

"I-I was, um…practicing." Chiaki said, looking around, likely checking to make sure nobody else was nearby to see her.

"Practicing? For what?" Nagito asked, his eyes level leaving her breasts, watching as the water dripped onto her mounds, sliding over her pale skin before collecting on her arm, which she held tightly to her body.

"I-I was…practicing swimming. So I could…do it with Hajime…" she admitted, and looked away in embarrassment, shifting enough that one of her nipples slipped out from under her arm, which made his eyes go wide when he noticed, and his dick throb harder. He could feel it straining against his pants.

"That's really sweet. How is it going?" Nagito asked, and Chiaki groaned.

"C-can you like…leave? Or just…I don't know! I-I'm…" Chiaki stuttered.

"Naked?" Nagito offered. Chiaki nodded, sighing.

"Look…can you help me look for my swimsuit?" Chiaki asked. Nagito nodded, and Chiaki turned around to head back to the water. Nagito immediately stared at her ass, which was large, pale, and beautiful. It jiggled and bounced with every step she took, and his erection throbbed even harder as he followed her.

The two spent about an hour searching for the missing swimsuit, with it becoming apparent that Chiaki was not as aware of how exposed her ass was while she made sure to keep herself facing away from Nagito. It allowed him to constantly shift his gaze to her and the beautiful, bountiful cheeks moving around and swaying, and when she bent down, he could even see between her legs, though part of it was covered by her hand. He wanted so badly to whip out his dick and start stroking, but he resisted.

Eventually, she cried out as she thought she saw it, and lunged with both hands, temporality exposing her entire front. Nagito watched as her breasts jiggled around as she moved, and he could now see that she was completely bare down below, the water dripping down her body and off her lower lips. However, it was a false alarm, and when she saw Nagito staring at her, her blush covered her entire face as she covered herself again.

After a while of searching, the two gave up and headed back to shore, with Chiaki covering herself still.

"Sorry we couldn't find it." Nagito said, but when he looked over at Chiaki, she looked…off. She was looking down at him, her face flushed, and she was fidgeting, her thighs rubbing together. He followed her gaze to find her staring at the very obvious bulge in his pants. Nagito felt his own cheeks flush as he laughed nervously.

"Sorry. I can't help it. I know it's very terrible of me to stare, but…you're quite gorgeous, you know." Nagito said. Chiaki went wide-eyed as her face became somehow even more red. "I…guess I should probably go now, now that you've found out what a disgusting pervert I am." Nagito turned to leave, but he felt a tug on his arm, and turned back to see Chiaki was no longer covering her chest. Her breasts moved up and down with her breathing, and she looked up at him.

"I-I…also…um…" she stuttered, sounding adorable, "…there was…other stuff…I've been wanting to practice doing…f-for Hajime…" She looked him in the eyes.

"Oh? Like what?" Nagito asked. Chiaki sighed, annoyed he'd missed it.

"C-can you just…take off your clothes?"

After doing that, Chiaki then proceeded to "practice" giving Nagito blowjobs, handjobs, and eventually, just having sex. She claimed the entire time it was so she could do it with Hajime, and even when Nagito asked if she had just given him her virginity, she didn't answer. Either way, both of them enjoyed it greatly and Chiaki asked if Nagito could be her go-to person for "practicing" sex stuff, and he happily agreed.