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."

Passion

Hinata.

Someone that Karasuno High use to be able to describe in a single word: Passion.

Passion for volleyball, passion for friends, passion for life.

Someone as bright as his orange hair when it came to breathing life into both his classmates and teammates. Or… at least he used to.

"Hinata!" Takeda-Sensei shouts as the boy leaves his class. It is the end of the afternoon in early winter. A soft orange sunset only seems to make the boy's bright hair seem even more apparent. But his efforts are ignored once again, Hinata walks off –no doubt heading for home.

"He ignored you again –didn't he Sensei?"

Turning the faculty advisor sees Yamaguchi, now a second year.

"Yes," the teacher admits looking back at the sunset.

Such passion. But, like the sunshine his bright orange hair reflects, every passion will set.

"Let's go to practice, Sensei."

And that was it. The end of another day.

He didn't hear about the news until the following morning during an early practice with the team had set up. At first when his phone rang he ignored it –too caught up in the practice match with the first year members, a team of four, against the second year members, only a pairing of two. Even so Yamaguchi and Tsukishima were winning the match: four-zero.

It was when his phone rang a second time and, now captain, Nishinoya's did as well that he had a bad feeling.

The funeral… it was a strangely bright affair. Even with the attendance of two dozen volleyball players from various teams, and a majority of the high school all in black –nothing seemed to even come close to negate the picture by the coffin of Hinata right beside his passion.

Jumping.

What an irony, he couldn't help but think. What clearly had been one of Hinata's best skill in volleyball, in life, used to take his own life? He couldn't have picked a more surefire way to reach the end.

Hinata had never gone home that night as he and the rest of the team assumed. Hinata would never go home. Hinata, like his passion did, went into the woods for a run. A run, that for Hinata ended Kageyama's life tragically when an earthquake big enough to release a few trees had it all tumbling down the base of the mountain buried beneath hundreds of pounds of rubble. A run, that for the rest of them ended Hinata's life just as tragically when he went over the safety ropes into the slippery rubble to jump off it all onto the sharp rocks below –sharp enough to pierce his neck and like the sunset end the brightly burning passion that had been Shouyou Hinata.

Hinata, the boy who always chased after his passion.

Even if it meant following love into the afterlife.

Isn't that what passion is supposed to be?

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!

I didn't like this prompt –I think I rewrote how to interpret passion half a dozen times before I settled on this idea. Sorry it's sad.