James, Sirius, Remus and Peter were laying on the grass by the lake. They were chatting and laughing, and having the time of their lives. Remus looked at his wristwatch. “Oh, Peter, we have to go study, the spot we reserved in the library requires us to be there in ten minutes, we’ll see you guys when you’ve failed your O.W.L.S.!” Remus said, as he and Peter got up and started running towards the castle.
“So, Padfoot,” James began when the two were finally out of sight. “Yeah?” Sirius asked. “Why are you calling me that right now?” he added. “Because it's a secret! Anyways, when are you gonna confess to Moony?” James said. “I don’t know, when are you gonna admit to being in love with my brother and confess? Oh, right, you can’t,” Sirius said. “Well anyways, I have to get going now, I don’t actually want to fail my O.W.L.S. y’know? And you’re hopeless, so I’m joining Moony and Wormtail in studying. See you later, Prongs!” Sirius said, as he ran towards the castle. “See you, Padfoot!” James yelled back.
A little while passed where James was just staying on the ground. “I’ve finally figured you out, James,” a somewhat familiar voice said behind a tree. “Regulus. How long have you been standing there?” James asked. “Not that long, don’t feel special,” Regulus said, still hiding behind the tree.
“Come on out, I mean, I know you’re there anyways, so you might as well talk to my face,” James said, voice full of confidence. He attempted to sit up, but was pinned to the grass by the one guy who shouldn’t find out about him. “I’m your enemy, for Heaven's sake! Why do you blush and hide your face when I pin you down!? Get your shit together!” Regulus said, a little louder than speaking normally but too silent to be yelling.
“We stopped being enemies a long time ago, Reg, at this rate we’re practically friends,” James said. “Besides, I could dominate you anyday, anytime!” he added. Regulus removed James’ hand that was covering his face and pinned it to the ground. “You could never dominate me, you fucking bottom,” Regulus said. There was something about Regulus’ aura, it seemed to have changed completely.
Regulus leaned down to James’ ear, “Come with me, to the quidditch changing rooms, nobody will be there this late,” he whispered. Regulus dragged James with him all the way there.
“What do you want?” James asked, once they got inside. He then heard a click as Regulus locked the door. “Did you just lock the door?” he asked. “I did, now, let’s play a game,” Regulus said. “A game?” James asked.
“Yes, a game,” Regulus said. “What kind of game?” James asked. “We play a game of Wizard Chess, let’s bet on it though,” Regulus replied. “A bet? Sure! I have enough money!” James said. “Not that kind of bet,” Regulus said. “What?” James asked.
“If I win, I can do whatever I want to you, what do you want if you win?” Regulus asked. “All of this is consensual, of course, we both give our consent to whatever might happen before the game may start,” he added. “If I win, you have to quit Quidditch, for good,” James said. “Alright, sure, I just have to not lose, then. I, Regulus Black, give my full consent to whatever might happen during this game and I promise to fulfill the bet whether I win or lose,” Regulus said. “And I, James Potter, give my full consent as well, to the game and the bet,” James said.
“Now, we begin,” Regulus said as they started playing the Wizard Chess game.
Regulus won. By a landslide. “Oh, Potter, it would appear I’ve won, now I get to do whatever I want to you,” he said. “I-I suppose that’s true, just- just get it over with!” James said, his pride wounded.
Regulus wasted no time in pinning James to the bench they’d been sitting on and kissing him, James whimpered a bit into the kiss, not because he didn’t like it, rather because he did. “After all that talk, you’re still a bottom,” Regulus said. “S-shut up, get on with it already,” James whimpered. “So impatient,” Regulus muttered, but undressed them both nonetheless.
He held his fingers to James' mouth. “Suck, do it properly or it’ll hurt,” he said. James took them into his mouth and began swirling his tongue around them, covering them in saliva.
Regulus took out his fingers and kissed James as he put one in his hole. He moved his finger until he could add another, and another and finally get James stretched out properly, even if he kept begging for Regulus to just put it in already. ‘That impatient bottom,’ Regulus thought to himself. As he pulled out his fingers, quickly (and skillfully) put on a condom and placed James on his lap as he entered his hole, slowly.
James moaned loudly and Regulus kissed him again as he began moving his hips and thrusting softly, well aware that this was definitely James’ first. “I’m your first, aren’t I? I promise I’ll be nice, if you’ll be mine from now on, that is,” Regulus whispered in James’ ear. James whimpered a bit. “I-I’d like th-that,” James managed to get out between moans.
Regulus knew James had to be close by now, and he could also feel himself getting very close. With a few more thrusts and a moan of the other's name, they both came together. Regulus kept his soft thrusts until they were both out of their climax and then pulled out, took off the condom, tied a knot on it and threw it in the bin. He then held James close and carried him to the showers to clean both of their bodies.