"Nnnn, S-Sirius," Remus whimpered as his hips almost moved on their own accord, grinding his boy's arousal in his pyjama pants against his roommate's.
The boy underneath him was panting hard, bucking his hips up frantically to meet the other boy's to gain more of the delicious friction they'd just discovered a few days ago.
Sirius and Remus were in their second year. Their friendship had never been quite the same as that with their other friends since the beginning. For once, they wouldn't sleep in the same bed with other boys that shared a dorm with them but each other.
That merely innocent act had also been the main reason that led to their not-so-innocent accidental discovery. Both of them liked to tangle their bodies and limps, and would sometimes even have childish play, namely tackling and rolling around with each other, until they tired themselves out before bed. It was that one night while they were still laughing and giggling quietly as they play fight in bed after their roommates had gone to bed that their lower bodies had pressed a little bit too closely, completely unintentional, making both boys gasped and threw their heads back.
They'd quieted down for a few seconds to register the immense pleasure that'd just shot through their bodies before they held each other close again. It was Remus that resurrected it, after they'd looked into each other's eyes uncertainly for long enough. He pressed his boy's member against Sirius', rolling his hips carefully while he observed the other's expression.
Sirius gulped and remained very still as Remus experimented. Something that felt wonderful gradually began to build in his lower body and he could feel that his boy's penis began to get hard for the first time. Being a stranger to this change in his body, Sirius prayed to Merlin that he wasn't being sick and there was nothing wrong with him, because oh gosh, he was slowly getting addicted to this new yet exciting and pleasurable sensation.
He parted his lips slightly when his breathing started to get heavy. He looked at Remus through hazed eyes as he involuntarily rolled his hips in return. Remus was now looking down at their tented pyjama pants. He'd also noticed that their boy's parts had gotten hard but he'd read in books that it was normal when guys were aroused. Beside, it felt way too good to put it to a stop now.
The boys continued to brush their arousals in their pants against each other quietly, only with a few soft moans and whimpers slipping past their lips occasionally. Their pace got faster and rougher along with the intensifying tingling sensation in their lower abdomens while their breathing got harsher until both boys arched their backs and bit on their lip to stop themselves from crying out loud and waking their roommates as their penises pulsed madly before softening.
Both boys flopped down onto the bed after the extreme pleasure had subsided, looking at each other in the eyes gleefully with a sated smile plastered on their flushed face.
"We should do it again." Sirius suggested quietly, pulling the covers up to cover the both of them, only to be rewarded by a firm nod from his friend before he reached for his wand to turn the lamp out magically.