DISCLAIMER: I DO NOT OWN HARRY POTTER!
It was the first day back after the battle of Hogwarts. The memorial was beautiful, and Neville had just seen it. There he had also seen Luna. Since it was almost night, he had thought she was in the Ravenclaw common room, but she wasn't.
"Hello Neville." She said, still staring at a bunch of flowers in front of Colin Creevey's name.
"Hey Luna. Do you want to go for a walk?" he asked, nervously.
She nodded, smiling a little.
It was still hot, being October it was strange, but nobody really minded. Complaining about better weather seemed just silly. Other people were walking there. Then Neville took her in front of the Black Lake. The sun was going down, and the scene was wonderful. "It's been quite a while I wanted to tell you this Luna." He started. Oh dear God what am I doing… I am stupid, I must be stupid, there's no other explanation… oh God… Oh God… she'll hate me…
"Oh me too. I think nargles started liking to live on these trees too." Luna interrupted, and pointed at them.
"Luna, listen. I know I'm one year older than you, and you probably don't... you don't…" Neville sighed, rubbing a hand over his face. "But I wanted to tell you…I love you Luna. I always loved you. Your silver eyes make me think of the stars only you taught me how to reach, your blonde hair makes me think of the sun in a winter day. You're so beautiful and you don't care if everybody thinks you're crazy. Because you're the only angel in heaven I ever want to meet." As soon as he had spoken the words, he instantly wished he could just apparate away. Which he would've absolutely done, if only you could apparate at Hogwarts.
Luna blushed a little. "Do you really think this? Or is your head full of wrackspurts?" She asked, looking directly into his eyes.
"If those wrackspurts made me fall in love with you, then bless them!" and there, in that breath-taking scenario, Neville kissed her. Part of him was shouting at him that he was just an idiot, the other part was shouting 'FINALLY!' at the top of his lungs. It was better than any dreams he'd ever dreamt about her. It was their first kiss, and right there, just kissing, they made the world a better place. A loving place.
She pulled away and looked at him. "Nev?"
"Yeah?" Neville looked at her, a bit fearful.
She just smiled. "See you tomorrow." And she disappeared, leaving Neville with the picture of that enigmatic little smile he would treasure for the rest of his life.
He wandered, smiling to himself and thinking. He looked around, at the impossibly vast Hogwarts grounds. "Yes," he said quietly, to himself, "yes, life is starting again."