A/N: Technically, a small continuation of chapter 19 (alcohol), aka the chapter where Eren gets drunk, needs a bathroom, and finds Mikasa reading in her room.
"Do you really need to study now?" Eren's voice is a high-pitched whine and Mikasa can't help the roll of her eyes. Ignoring him, she returns back to her laptop, attempting to study for her upcoming orangic chemistry exam. It's worth far too much of her grade to ignore for much longer and if she's honest, she's been spending far too much time with Eren lately and not nearly enough time focusing on school.
"Mikasa," Eren tries again, his voice louder this time, "can't you do it tomorrow?"
"No," she murmurs, absorbed in her textbook. "I have work after school tomorrow. There won't be any time."
She pulls her legs up onto the computer chair beneath her, crossing them in a rather unladylike manner, her skirt hiking up farther than it ought to at the motion. She supposes it's okay, though, for there's only Eren in the room with her and anyway, she's got stockings on. She twirls a pencil in her hand and stares idly at the wall in front of her for a moment, knowing she ought to get back to studying but finding herself so terribly bored already, only ten minutes after opening her book.
She hears Eren turn on her television behind her and she sighs at the noise, turning to stare at her boyfriend who has made himself rather comfortable on her large bed. The quick motion causes her glasses to slip down her nose and she sighs once more, louder this time.
"I'm glad you finally got glasses. They're pretty hot, you know." If Eren's suggestive tone is any indication to what he wants, she knows she's got no more than five minutes to avoid the inevitable—if she's lucky. She turns back to her laptop and makes a point to not answer him.
"Mika." Eren's voice is surprisingly close and she knows he's gotten off the bed. Still, she jumps when she feels his hands on her shoulders.
"Yes, Eren?" She turns once more to look up at him, her eyes automatically drawn to his mouth from the angle—oh, one kiss would be lovely and certainly not too distracting from her work…
She's sure he notices her staring by the way his lips curl and he leans down to kiss at the corner of her mouth. He peppers more across her face before finding her lips and she knows she's fighting a losing battle when his hands move to hold her waist.
"My exam, Eren…" she starts, shivering at the way he nips her lower lip.
"I think I need to do some studying of my own," he murmurs back, clearly amused, obviously entertained by his own joke. He falls to his knees behind her, grabbing her chair and turning it to face him, her crossed legs now in front of him.
"How…?" She doesn't bother to try to hide the way her voice rises high as he leans in, biting at her thigh through the sheer stockings covering her.
"These stupid stockings," Eren says, his breath warm and far too close to where she'd really like him to be placing his mouth. "They're too damn cute."
She can't help but remember that she'd worn a pair very similar to the first time she'd met him, though that pair had been black and these were white. At the top, hidden beneath her skirt, the stockings ended with cat ears, and it was these that Eren was now tracing with his tongue. (She'd liked the black ones much better, but Eren had accidentally torn them the first time they'd slept together, far too excited to realize the material was so thin.)
She doesn't realize the way she shifts her hips closer to him until Eren is smiling, playfully saying, "Oh, I didn't realize you were so eager for me to help you study."
Her face flushes and she moves to sit up straighter, to turn herself around and face her desk once more, when Eren stops her, pulling her chair closer to him again. He leans in, breathes softly against the skin inside her thighs till she's squirming in his grasp, before he sighs in a way that's far too pleased and content.
"There's still so much for me to learn, too," he says into her skin, and it's the last sentence she really pays attention to; they spend the rest of the day studying, her exam forgotten.