Thread by @revereri

nsfw #miyacestober2022 day 28 • animal traits + first time , underage //

the two little fox hybrids had been running in the forest when it happened. osamu was ahead, faster than his brother for once, but suddenly he collapsed for seemingly no reason. +

his body was heating up and his mind felt foggy, he didn't know what was happening to him.

he could hear atsumu calling his name, increasingly anxious, but couldn't bring himself to respond.

finally, atsumu ran through the bushes and found him lying in the middle +

of the clearing.

upon seeing him, atsumu had a full-body reaction, first stumbling back, before rushing to osamu's side.

"tsumu," osamu gasped, "i dunno what's happenin' to me." he pressed his knees together, feeling a strange wetness come from between his legs. +

"it's happening to me too," atsumu said. "i think— i think it's our heat."

heat? but they weren't of age yet. and they didn't—

"i don't want anyone to see me like this," osamu sobbed. he was scared and he was embarrassed. +

"it's okay," atsumu told him, though his voice was shaky. "we'll take care of each other."

then, slowly, he laid his body on top of osamu's. everywhere they touched, it felt like /fire/. all their hairs were standing on end, their nerves going into overdrive. +

it felt so /good/, but there was one problem.

"we can't," osamu pleaded, as atsumu rubbed their hips together. he moaned, and continued, "ma told us that we can't— do this together."

"but it feels so right," atsumu retorted, looking down at their hardening cocks. +

they jutted out from their pants, wet patches already forming. he ground them together again, and groaned.

"we're twins," osamu tried again. it was true he would rather... do anything with atsumu rather than anyone else, but his parents always told them it would be wrong to. +

atsumu didn't seem to care. "it feels right though, doesn't it?" he whispered. "no one has to know, just you and me, samu, just you and me."

osamu bit his bottom lip and threw his head back. it was hard to resist atsumu, especially in his current state. +

"okay," he relented in the end, beginning to rock his hips too, "no one else will know."

and that had been the very first time the twins got together, humping each other desperately in the middle of a forest.

it was not the last time, for they would spend +

each and every one of their heats together after that, having imprinted on each other. it felt /wrong/ to even think about anyone else, even when they got older and people started talking about the strangeness of their closeness, +

considering it was a time most hybrids their age were looking for mates.

it didn't bother the twins though, because they knew it was right.