Based on this prompt from OTP Prompts on Tumblr: post/109885930850/imagine-person-a-lightly-tracing-i-love-you-over
Ruby is 17-18, Weiss is 19-20.
Ruby sighed quietly into the night, staring at the ceiling. Sleep had been hard to come by for her, what with the semi-constant plots from Roman and the White Fang, and she had been falling behind on her homework for sometime now. She just had so much to do, and even with Weiss helping her..
Thinking of her frosty partner, she rolled onto her side to see Weiss's back. She was only moderately surprised to see Weiss's mostly bare back, some parts covered only by her bra strap and their blankets, as she's been up most of the night, doing this very thing multiple times.
She didn't know why Weiss was sleeping without her nightgown.. Actually, she knew why, they had had an accident involving tea, she believed, earlier in the day, but she didn't know why her partner didn't insist on washing one of her already worn nightgowns, or seeing if she had a clean one.
"That's the problem with you, Weiss.. I can't figure you out." Ruby murmured quietly, lightly pressing the pad of her finger into Weiss's back. Her back was soft and felt slightly cool to the touch, causing Ruby to let out another quiet sigh.
"You yell at me, then complement me like, five minutes later.." Ruby mutters into the night, her finger unconsciously tracing eight letters onto the soft skin of Weiss's back. "I love you". That's what she wrote, in quick, short finger strokes.
"You're always so critical of me, and yet are always so quick to rush to my defense.." Her finger moves to a different part of Weiss's back, tracing those eight letters, those three words, that one phrase again and again, each set of words being traced somewhere different.
She sighs again, resting her hand on Weiss's side. "I.. I love you, Weiss." Her heart wasn't hammering as hard as she thought it would be, as hard as Yang insisted it would. Perhaps because Weiss was asleep, and wouldn't know? Ruby wasn't sure as she laid on her back, staring up at the ceiling again.
She was indifferent to a slow movement beside her, or Weiss wrapping her arms around Ruby's waist. She had, on occasion, gotten up in the middle of the night for some reason or other, and seen Weiss cuddling one of her pillows.
She wasn't, however, indifferent to the feeling of Weiss's lips brushing against her ear, and the whispered "I love you, too" Weiss spoke into it. Her face flushed red. This was definitely not how she wanted to confess to Weiss for the first time..
A/N: There you go! My first published fanfic of any size, so please tell me how it is! I apologize for any mistakes I may have made, and if you have any comments, complaints, or writing tips, I welcome you to PM me or leave a review! RWBY belongs to Rooster Teeth and the late Monty Oum, may he rest in peace.