A/N: Written for Slash September using Neville (Neville/Dean/Seamus) and for Back to School using "experiment" on the Hogwarts Challenges and Assignments forum. Word count: 443
Not an Experiment
Neville rubbed the sleep from his eyes. Turning his head to one side and then the other, he observed both of his boyfriends for a time, never able to look at either of them long enough. He couldn't contain his smile when he thought of how lucky to have them beside him.
Before their relationship had gone beyond friendship, Dean and Seamus had felt impenetrable. Neville had watched their relationship develop with increasing jealousy, but he hadn't been able to discern who he was jealous of. Realizing it was both of them had helped him make sense of his feelings, but it hadn't solved many of his problems. The largest of which being that he was in love with two boys who were madly in love with each other.
His smile widened as Dean began to stir. He craned his neck to look at him, one of his arms still pinned under Seamus' shoulders, which wasn't going to be fun once he could move it again.
"Good morning," Neville whispered as Dean's eyes fluttered open.
Dean smiled.
"Good morning," he mumbled in response.
He leaned over to kiss Neville, and Neville did his best to return the kiss despite the awkward position it forced his neck into. Dean realized that Neville couldn't move and pushed himself onto his elbow, grinning when he saw the way Seamus had smothered his face in Neville's shoulder.
A long time ago, Neville had been horribly jealous when one of them looked at the other like that. His insecurities about being nothing more than an experiment would overwhelm him. He'd been certain they were going to leave him to return to their perfect life of just the two of them eventually.
That had never happened, and Neville had finally been assured that it never would.
There were only so many times Dean and Seamus could look at him with love in their eyes before he realized that they cared for him as much as they cared for each other. The realization had been invigorating.
"We should wake him up," Dean said, struggling to hold back laughter.
Neville shook his head.
"Let him sleep a little longer."
He reached up to brush hair from Seamus' eyes with his free arm.
"You're going to be awfully sore," Dean said, raising one eyebrow.
Neville hummed in agreement, but he still didn't let Dean wake Seamus.
"It's Saturday," he said. "I have plenty of time to be sore before Monday."
Dean laughed and leaned over to kiss him again. Their giggling was what roused Seamus minutes later, but luckily, Dean and Seamus were as content to remain in bed as Neville was.