Mikasa's heart was racing and her breathing was hitched. "Annie, here?" she whispered nervously. "Are you sure?"

"Quite sure, Ms Ackerman," the librarian purred. "I think this place is perfect."

The two had been dating for about three weeks now and all the while Annie delved deeper into Mikasa's fantasies. Learning her secret desires, what she felt wet about just thinking of. Annie just listened and listened, that same lilting smirk always on her face.

Annie was a good listener and Mikasa felt as though she could trust her. Which was good because from what Annie had explained about BDSM, a relationship was built on trust and a willingness to listen. The bottom trusted the top enough to allow them to do things to them for pleasure. And the top listened to what the bottom was and was not okay with.

The more Mikasa learned, the more interested she became. The darker side of pleasure just sounded so enticing, so right down her alley of what felt goo. She just kept asking and Annie was all too pleased to tell her.

Annie's hand brushed against Mikasa's stomach before sliding under her shirt to touch skin. Right now they were in the library, hidden the back in the mainly untouched sections beside the fire exits.

It was late in the evening but even so, there were still people around. And anyone of them could walk in on them.

Annie's hand ran along the muscled plains of Mikasa's abs, sending electricity up her spine. "Are you okay with this, Mikasa?" the blonde whispered. "We can always take this back to... my place if you're uncomfortable."

It was first time they were going to have sex together. Sure they'd made out a few times but this was moving more physical. And honestly this was the hottest thing that Mikasa had ever done.

"Go ahead, Ms Leonhardt," Mikasa breathed out. "You're taking your time."

Annie's grin was enough to answer her. The blonde leaned into push away her scarf, giving her access to her neck. Lips met flesh as Annie's fingers began to explore under her shirt. Threading softly up her abdomen until she skimmed somebody under breast.

Mikasa's breath was shaky and she hadn't a clue what to do with her hands. Annie had her pressed up against the space between the bookshelf and the fire exit so she just braced them against the wall.

She felt a hand caress her breast before sliding underneath her bra completely. Fingers massaged the mound, feeling and stroking with gentle swipes, and Mikasa felt her breasts peaking at the contact.

"Good," Annie exhaled near her ear.

Annie slid her hand down, stroking its way horizontally from hip to hip, teasing. Mikasa's core was begging for contact and her hips jerked against their will. Annie stopped just before she entered her pants.

"Do you trust me?" Annie paused her movements and so did Mikasa. Annie's blue eyes met her grey. "I need to hear you say it."

Did she trust her? Of course she did. Mikasa didn't hesitate. "Yes."

Annie stepped away from her and Mikasa was confused. What was she doing? Why had she stopped?

Annie took off her tie and held it in her hands. Mikasa gazed at it and then at her girlfriend, realising what she was going to do. Annie was waiting for a sigh of approval. Mikasa nodded and Annie moved in.

Without a word, Annie bound her hands behind her back and to the long handle of the fire escape door. She was really good with knots and when Mikasa tested them, she found she was truly tied. And she felt herself get even wetter.

Annie smiled. "So pretty. Just a needing a finishing touch." She took Mikasa's scarf from her neck and raised it towards Mikasa's head. And blindfolded her.

Now void of sight, Mikasa's senses were on fire. Her heart was pumping at high speed. Oh go, oh god, she'd never been so aroused. She didn't know what her girlfriend was going to die, couldn't know where she was looking or how she was grinning.

Annie's hand suddenly landed on her neck and Mikasa jumped. "Relax," the librarian purred. "Not many people come here but if they hear noises, who knows what could happen? I'd advise silence."

The hand lifted away and Mikasa was left in tense anticipation for her next touch. The denial and teasing just set her on edge. Annie's hands were on either side of her waist and she heard her purring. One hand stroked its way downwards, slipping past the hem and into Mikasa's jeans. It cupped her sex and Mikasa couldn't help but moan.

"Soaking already," Annie murmured, first two fingers probing the wet spot of Mikasa's underwear. Unknowingly she brushed against Mikasa's clit and the dark haired woman found herself gasping.

"What did I say about quiet?" Annie whispered. "In all it's your decision. I can easily leave when someone comes and they'll see you, trust up and helpless. Can't say what they'll do. Free you? Or who knows? Take you against your will?"

The very thought of a stranger, someone she couldn't even see taking her when she couldn't fight them off just aroused her even more. It shouldn't have and she knew that. But dear god wasn't the thought hot.

"Ooh I think that just made you even wetter," Annie murmured. "Does rape-play excite you? Who could tell such a kinky bitch lay inside this beautiful exterior?" A finger ran along the hem of her panties. "Maybe I'll take a feel inside your darker interior.

Annie's hand pushed its way into Mikasa's underwear. Her hands were experts and Mikasa was shaking. A finger ran along her slit and her hips twitched. Annie made a sound of approval.

"So wet and ready for me, Ms Ackerman. How does it feel? Is your body ready for me?"

Mikasa said something inaudible. She heard Annie chuckle and a hand nudge her chin. "Please," Mikasa begged. "Please."

"Please what? Tell me, Mikasa. What do you want me to do to you?"

"Fuck me," Mikasa breathed. "Please. I need you. I need you inside of- oh god!"

Annie slid a finger into her while she was talking and Mikasa moaned. Slowly Annie started pumping in and down, gradual at first but picking up speed. Another finger joined the first and Mikasa could feel herself clenching. Oh god, oh god, it just felt so good.

Annie pressed a kiss below her ear. "That's a girl… Come for me..."

And Mikasa could feel herself building towards her release. Feeling Annie inside her, satisfying her, oh god, she was on edge. Annie was focusing on one spot and every time she felt like she was going to come just from it.

Mikasa was biting her lip to stop sinful noises coming out of her mouth. Even so, she was whimpering. It just… It felt so astonishingly amazing. Never before had Mikasa had sex like this. It had never been as heated or as risky as this. It was a whole new level of arousal that Mikasa couldn't begin to grasp.

Annie's thumb circled her clit, giving the throbbing knob the attention it was begging for. Mikasa felt the pleasure ripple right up to her stomach. She let out a cry but quickly stifled it for fear of being caught.

She was close. So close. Annie was panting too, hot breath hitting the side of her neck. Annie's spare hand slid up to cup a breast, rolling a nipple beneath her fingers. Close. Closer.

And one last whisper from Annie. "Come."

Mikasa let out a quiet cry as she came, her body setting into a spasm as she rode out the orgasim. Never before had she cum like that. She was a quivering mess when she finished and Annie seemed pleased.

"Very nice," the woman purred. "Hear."

Mikasa felt her fingers slide out and out of her pants. She felt two warm digits press against her lips and Mikasa obediently sucked them into her mouth. She could taste herself on them, the sweet taste of her arousal.

She licked them clean and then Annie pulled her hand out.

"How did that feel?"

"Amazing…" Mikasa breathed. "I've never felt like that before."

Annie untied her hands and slid her scarf down to her neck. Mikasa gazed down at the librarian, her chest still rising and falling. Annie's glasses were knocked askew and there was that trademark grin on her face.

"There's plenty more where that came from, Ms Ackerman," she grinned. "If you're willing to play my game."

Mikasa kissed her. She cupped her cheeks with her hands and pulled her face towards her. They met in a hit heated clash and passionately dove in. Mikasa's tongue swept in, exploring Annie's mouth and exchanging the taste of her to her girlfriend.

Annie moaned low in her throat and gripped Mikasa's shirt. Teeth nipped at her lower lip, before slowly sucking it inside her mouth. The control swiftly vanished from Mikasa as Annie dominated the kiss.

Mikasa could feel her orgasism sitting in her panties and broke away, chest rising and falling. Annie exhaled, a wild look in her eye.

"Need to clean yourself up, Ms Ackerman," she smirked. "Make yourself presentable."

Mikasa entwined her fingers with hers. "Care to assist me in that, Ms Leonhardt?"

Annie's blue eyes twinkled. "I'm afraid I'd just make the problem, um, worse. Wouldn't be able to resist."

"Oh what a shame. You'll just have to come by my place later," Mikasa sarcastically sighed. It was an open invitation. Come to her place could mean anything. Anything. Anything they wanted.

And Annie smirked, bringing with it a promise of pain and pleasure. And Mikasa pressed her thighs together to suppress the tingling. Annie kissed her cheek. "I think we can arrange something of the sorts."