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Every summer, Midoriya and Iida return to the same beach. Living so far apart had been a bit straining on their friendship at first, but what started as a harmless comment quickly spiraled into something more.

“I’ve been putting on weight at university. It’s getting to be a problem.”

“I don’t see a problem at all, Iida! It… it looks good on you.”

And every summer since, Iida found himself hoping for more of the same reaction. Midoriya was too easily flustered; it’s bad for his heart - or his self-control - to see his friend get a little pinker with every inch gained, every fleeting summer sunset spent together, away from the curious gazes of high school friends. Iida knew he didn’t need to keep gaining weight to keep Midoriya’s shy and rapt attention. He could have stopped many, many pounds ago. But then another thing happened: Midoriya started to get softer, too.

“My job requires a lot of sitting. I must be snacking more than I realize. Do you think this will be a problem for me too, Iida?”

It started with just a few scant inches around his middle. A little softness. Midoriya had always been a bit gangly. But Iida couldn’t help encouraging him. A few soft caresses - first by accident, and then on purpose - were enough to light a fire under his friend’s latent desire to join the fun. And it WAS fun. Spending a year growing in secret, thinking of how their friend would react to their bigger, fatter form after months of waiting.

The next summer, Midoriya was even softer, filling out rather evenly all over. Iida had grown more too, but at nowhere near Midoriya’s rate. But Iida had been expanding, filling himself to the brim for years and had the figure to show for it. Midoriya was foolish to think his small little stomach could rival his veteran gut. But Midoriya’s skin was starting to show the signs of his gluttony, his desperate efforts to catch up to his friend hadn’t been in vain. And imagining him struggling to swallow just one more bite over and over again meant that Midoriya was never far from his mind.

And seeing his friend from across the beach that next summer - THIS summer - Iida had to swallow his heart a few times. Midoriya was massive. An absolute pile of striped, wobbling flesh spilling out of a too-small swimsuit and looking pleased to see him. His navel was stretched tight - but Iida knew it would deepen as his body adjusted. Iida’s own body was quite used to the rounded gut he’d been sporting for years now, and his navel was deep and flexible enough for pleasure. And maybe this past year, Iida had started overeating a bit more purposefully again. Midoriya was nothing if not encouraging, and Iida didn’t want to lose his lead. And he’d already glutted himself at both breakfast and lunch before meeting up on the beach at sunset. His upper stomach protested every step he took towards his secret summer fling.

“Iida, it’s so good to see you!”

“Midoriya… you look great.” Ah, he hadn’t meant to start off with such an obvious comment, but he couldn’t help it. Close up, he could see how all the pounds clung beautifully to Midoriya’s smaller, more petite frame. This had to be the upper limit of what his body could take. His round, soft stomach was the biggest attention grabber, but his thighs… they practically swallowed his suit. Everywhere Iida looked, he found something to fill his cock.

“Iida…” Midoriya stepped in closer, with flushed cheeks. Their bellies pressed gently together, and spark zinged through Iida’s entire body. “You’re also looking… great.”

Without taking a step, Iida pushed his hips forward and let his belly push further against Midoriya’s. Bliss. And Midoriya returned the favor, taking a small step, crossing his arms behind his back, and pushing his front forward, their bellies crammed together in a way that was almost uncomfortable. But not enough to make either of them step back. Their difference in height had Iida’s own full stomach blocking his view of Midoriya’s, but he could feel how his loose lower belly sat perfectly against the pad of fat just below Midoriya’s navel. They fit together like puzzle pieces. Could they get even closer? If they could lift their bellies to the right height, their cocks could touch. Or maybe they were too far gone for that… Iida throbbed at the thought.

“Iida?”

“Yes, Midoriya?” He sounded breathy and over excited. But how could he possibly calm down?

“I… I don’t think our guts are big enough to hide our excitement. We’re going to get in trouble.”

“I think people already have enough to stare at, don’t you?” Iida snapped his hips, just enough to send a ripple through both their bellies, bringing back memories of last time, the same ones that sustained them both all year long.

“That’s true, but still.”

“You’re right. We still have our decorum to consider. But Midoriya, do you even have clothes that fit?” A little tease. Just a small one.

“Of course I do. Ochako helped me pick them out. We made sure my modesty would be intact.” Iida wondered if they could fit into the same clothes someday.

“I should have asked for her help, then.” Iida reached down, feeling the deep hang of his lower belly between them. “The shirt I brought leaves a little too much skin peeking out.”

“Ah, well that’s - AH!” Midoriya couldn’t stifle a cry as Iida’s fingertips brushed against his distended swimsuit. Their cocks were scant inches apart, and Midoriya was as hard as he was. Iida shook his head and tried to focus. He had to be patient.

“Nevertheless, we should be going. We have a full night planned.” They pulled away reluctantly, the summer night air was cool against their heated and stretched skin.

“Yes… we do. We’ve been preparing all year.”

“Indeed, we have.”