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, kink, masturbation.

Disclaimer: I do not own Haikyuu. I'm still fairly inexperienced when it comes to dealing with Haikyuu.

"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."

Enthusiasm

"Come on, come on –come on! Move faster you slow poke! Let's go already! Do you not know the meaning of the work faster? It means more fast!"

"Wow…" Sugawara whispers at the sight. "I never thought I'd see a day were Hinata of all people wants to rush out of volleyball practice, even if it's just putting the equipment away."

"I'm just glad I'm not Tanaka right now," Sawamura chuckles as Tanaka's sudden sneeze trips him and Hinata to the ground –spilling the various volleyballs he had been carrying to storage and causing Hinata to go in a frenzy picking them up.

"Though," Sugawara starts with a small smile, "I wonder what in the world could get him more excited than volleyball."

"A little birdy told me that Kageyama's letting him sleep over for the first time tonight."

Jaw dropping Sugawara's voice echoes throughout the gymnasium:

"He's what!"

AN: Mania is a series inspired by Haikyuu including several pairings, inspired by a request from my personal friend for her birthday! 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!

So… I think I was channeling Hinata a little in this one because: NEXT MONTH IS THE LAST UPDATE! Yup! It's been a year already and next month will be the reunion and final chapter with the self-titled update: Mania. That's also why this chapter is soooo short –I'm so pumped for next chapter I didn't even want to spoil anything but no matter what I wrote this month it wasn't go enough! T_T –so I decided to just be realistic with this update: Hinata's pumped, I'm pumped, and Kageyama may or may not have a heart attack…

Good luck and: See you all next month!