Summary: This is their mania –their obsession, their enthusiasm, their craving. Nothing and no one can stop them, not even themselves. Not that they really want to stop, that is. Warnings: Kageyama/Hinata, and suggested lemon.

Disclaimer: I do not own Haikyuu. This is my first story for it. I'm doing this for you Little Fangirl1! Happy Birthday!

AN: Mania is a series inspired by Haikyuu including several pairings, inspired by a request from my personal friend for her birthday! You're almost able to legally drink Little Fangirl1! Almost! Not quite there yet! But still to a great next year! None of the stories in Mania have to do with one another and will be uploaded as one-shots. So read in any order you of your choice!

"Mania"

Defined as "an excessive enthusiasm or desire; an obsession", synonyms for include: "obsession, compulsion, fixation, fetish, fascination, preoccupation, infatuation, passion, enthusiasm, desire, urge, and craving."

Fixation

"Wake up, master." A soft voice moans into his ear. Groaning he ignores the weight sitting on top of him as well as the as something familiar and hard rubbing into his crotch. "Master," the voice whispers in his ear, then nipping it.

Black-brown eyes snapping open it isn't long before a flash of orange has Kageyama staring at his… lover's [?] face. Boyfriend? Fuck buddy?

Communication never was their strong suit.

"What… what are you?" Looking over at his bedroom window the sun is barely over the horizon… and isn't it winter break. Shifting his gaze right back over to Hinata his questions die in the back of his throat.

Now sitting on his lap, rather than hovering over him, Kageyama can see what Hinata has decided to wear –or rather the lack of what he's wearing.

"Happy birthday, Master Tobio," Hinata coos his obviously hard cock peeking out over the small tight white bikini bottom, framed on each side by a little black bow. Trailing his gaze upward Kageyama can see across Hinata's lithe form pure skin until a black string catches his gaze. Connected on either end of the black string is tiny black outline with white lace triangles that make up the bikini top. And bows. Lots of bows. One on each corner of both triangles, not to mention the large one he can see done in black and tied behind Hinata's neck. And the big white bow tied in Hinata's orange hair.

With two small hands guiding his own Kageyama can feel his boner rage up to stand right in front of Hinata's as smooth, bare ass cheeks are pressed into him. With only what he can image is a white rope separating the ass cheeks and a big black bow tempting him.

"What can this lowly maid do for you –Tobio?"

Following the sentence comes a wave of pleasure as Hinata rolls his hips into Kageyama Jr. instinctively forcing the master of the situation to tighten his hold. On those damn ass cheeks.

"Shouyou…" The growl is unavoidable.

And that damn cheeky distraction. Smirking and loving every moment of it.

Leaning back down over him Hinata whispers, "Happy birthday," before biting hard on his lower lip.

Oh. Shouyou is going to pay –as is his ass and those darn bows!

AN: I've never written for this pairing before and I hope that doesn't come out too explicit that I am inexperienced. I really wanted this to go all the way like you wanted, my friend, but its so funny and fitting to stop right here! And now you're getting a year's worth of this pairing on the 21st until your next birthday! Yay!