Neville had been getting better and better at remembering things. This did not prevent him from the occaisional slip up, however.
When he stumbled across Draco hovering a bunch of mistletoe over Luna's head in the Charms classroom as he entered to retrieve his forgotten notes, he fought the urge to hex Malfoy. He was still frozen in the spot, debating whether or not to pull his wand on Malfoy when Luna spoke.
"I told you… the Nargles… I don't like mistletoe…"
Malfoy let the mistletoe drop on the floor with a soft chuckle. Luna kicked it away, before he put his arms on either shoulder.
"Now where were we?" He asked, amusement in his voice.
Luna leaned up to kiss him. "Somewhere here…"
Neville's jaw dropped and he exited the room silently. If it hadn't been the middle of winter, he would have sworn that what he had just witnessed an April Fool's joke.