Disclaimer: Not mine. Shame, really.
Just so you know, just to save any confusion, Hermione and Severus are in the same year at Hogwarts (same age), so, Severus was born in 1980, rather than the canon 1960.
I will try to stay as canon as I can, but until Severus actually goes back in time, there's not going to be much at all that really is canon. But it will get better as I go along.
"Gotcha," drawled Severus as he finally caught her.
Hermione giggled and pretended to struggle. "Severus!"
He chuckled. "Yes?" he murmured in her ear.
"I love you."
Severus smiled and put Hermione down, lying her down on the mossy forest floor, joining her a moment later. He wrapped an arm around her shoulders and said "I love you too, my little Gryffindor."
They lay like this for a while, simply enjoying each other's company. In the beginning, they hated it that the only place they could really be alone together was inside the Forbidden Forest, but they had warmed up to it, and eventually the spot had become their own. They couldn't be like other couples, mainly because they were Gryffindor and Slytherin. Both Severus' and Hermione's friends disapproved, but grudgingly accepted it. Well, all except Ginny. She thought it was adorable.
They had been together for nearly two years now, since their fourth year. It had been just after the first task during the Triwizard Tournament that they finally stopped seeing each other as friends. Prior to that, they had been very good friends, they had been since their first year. They were both extremely clever, both fighting for the top spot in the year. It often got very competitive.
The sky began to get dark, and Severus stretched his arms out, and looked over at Hermione. She was asleep. He smiled, and shook her gently. "Hermione, love, wake up. It's getting late. We've got to get back."
Hermione eventually opened her eyes. Yawning, she stood up, and fell into Severus's arms, hugging him. "Mmm. Sorry I fell asleep."
Severus shook his head. "It's okay. I love watching you sleep, you know. You're beautiful." He snaked a hand to grasp one of Hermione's, and together they walked back up to the castle.
As they reached the entrance to the dungeons, they stopped. Severus gave Hermione a tentative smile, and said "I have to go." Pressing his lips to her forehead, he added "I love you, Hermione."
"I love you, Severus. I'll see you tomorrow?" she asked as she watched him make his way to the entrance to his common room.
As he pushed open the door leading to the next corridor, he said "I'll make sure of it. Goodnight, Hermione."
"'Night," she said, as the door closed behind him.
She walked up to the Gryffindor common room, reliving the day in her head, particularly the hours she spent with Severus.
She gave the password to the Fat Lady, clambered through the portrait hole, and flung herself into a chair by the fire next to Harry.
"Hey, Harry. Where's Ron?"
"Lavender," he said shortly.
Hermione sighed. "Again?"
Harry leaned back, abandoning his Charms essay.
"Yeah. Again. It's getting ridiculous. I just don't know what he sees in her. Just like I don't know what you see in the Greasy Slytherin."
"Oh Harry, lay off Severus for a minute, will you?"
"Sorry 'Mione. But this whole Ron/Lavender thing is pissing me off. She's a pain."
Hermione grimaced. "I know what you mean. But you think you have problems. I've had to share a room with her for five years."
Harry patted her arm in sympathy. "Damn. Sucks to be you."
She shook her head. "Tell me about it. Now, all she talks about is Ron. It used to be boys in general. I thought that was bad. But now it's all about Ron. She doesn't leave out any details, either. I love Ron, as a brother, so I do not need to know what he is like in Lavender's department. It's sick."
Harry clapped his hands over his ears, shaking his head vigorously. "Don't wanna know, don't wanna know, don't wanna know..."
"Look, Harry, I know you don't want to hear it, but I need to tell you this. Possibly a reason to get them away from each other, I don't know. But, they have done more than Severus and I have, and Severus and I have been together at least four times as long as they have. What does that tell you?"
"That Snape is lacking in that department?"
Hermione hit him on the arm. "No, it means that Ron and Lavender are ruled by their hormones. It's not going to last. I can tell you that now." Harry nodded. "And I can also tell you that they have not had sex yet."
"Argh!" Harry covered his ears. "Don't need to know, Hermione!"
Hermione grinned. It was so easy to wind Harry up.
"Hey, Granger."
"Malfoy."
Malfoy smirked, and stepped in front of Hermione, blocking her way. "Come on, Granger. I'm trying to be nice here."
Hermione snorted in disdain. "You? Be nice to me? What the hell happened to 'filthy little Mudblood'?" She tried to push past Malfoy, but failed.
"Hey, hey. That was the old Draco. This Draco is trying for a bit of inter-house cooperation. I thought I'd start with you, considering you're seeing Severus and everything."
"Very kind of you, Draco. Now, if you don't mind, I have to get going." She managed to get past the blonde, but he grabbed her by the arm and prevented her from going anywhere.
"Look," he growled. "I'm trying to be nice to you for Severus's sake. Surely you can try as well, for the same reason!"
Hermione was about to reply, but she was cut off.
"What's for my sake?" Hermione looked around to see Severus walking toward them, frowning as he saw his best friend clutching the arm of his girlfriend.
Hermione wrenched her arm out of Malfoy's grip, and took Severus's hand as he caught up to them.
"Hello, love," he murmured to Hermione. "What's for my sake?" he repeated to Malfoy, getting more curious by the second.
Draco shrugged, saying "I was just trying to make a bit of peace with your girlfriend there. You know, considering the two of you are together and all. I just thought it'd make life a bit easier for you. Not having to choose between her and us all the time."
Severus sighed. "Come on, Draco. You know I try to divide my time between you and Hermione as equally as possible. It works. It's fine."
"What'd I tell you, Malfoy? No point. Come on, Severus. Charms."
Severus smiled at Draco. "See ya later, mate," he said, before he and Hermione made their way up to the classroom.
Hermione and Severus sat in their usual seats, about halfway back, and off to the side. Looking at what was written on the board, the lesson looked to be a rather mundane one. The work was for that of an average sixth year, not advanced, like those in their class. Repairing Time Turners.
Severus leaned over to Hermione and whispered "Surely we don't have to do this. A waste of time. Imagine the other things we could be doing." To clarify his point, he ran a finger up her leg, before she slapped it away, giggling.
"Severus!" she admonished him, trying to pull her focus to the lesson, and away from the thoughts that Severus was no doubt thinking.
They got to work, and completed the task with no trouble.
"Pass me that Time Turner, love?" Hermione handed it over, and Severus started fiddling with it.
"Severus, what are you doing?" Hermione was concerned. Time Turners were known to be rather temperamental.
He smiled at her. "Just going to give you a bit of a challenge, my clever little Gryffindor."
Hermione grinned. She loved a challenge. "Go on then."
She sat patiently, waiting for Severus to finish making it difficult for her. However the next thing she knew, Severus was yelling, and before she could grab him, hold him, stop him, he had disappeared.
Hermione screamed. "SEVERUS!"