Stiles wasn't a violent person, not even close. He prefered using words instead of physical abuse.

But ever since Void, ever since that darkness touching his soul, his heart, something changed. It becomes harder and harder to control his anger, to stick to only words.

Nigitsune has woken something inside Stiles, twisted it that now he could feel the gnawing anger, forcing him to act, to do something, to move.

He tried to stick to words, he tried but sometimes it just got too much and he got just too angry.

Add anxiety in the mix and he was a wild tornado, just going forward.

Now was one of these times.

Derek could sense how Stiles anxiety changed to bubbling anger and how that anger changed to something furious.

It was a blink of an eye when Stiles rushed forward, pinning the other guy against a wall, his arm pressing into the guy's neck, cutting off his breathing.

Stiles was furious and he didn't even care that the other guy was a werewolf.

- Answer me! - Stiles pulled the guy forward and slammed him back against the wall with such a loud crack that it made everyone else around the room wince.

The werewolf guy tried to chuckle, holding to his last straws, clearly dizzy from hitting his head against the wall.

It seemed to only anger Stiles more because in the split second he threw the guy to the ground with one hard punch, breaking the wolf's nose.

- You will answer me! Or I swear to every dark creature in this damn hell hole that I will rip you apart piece by piece while you will beg to be dead! - Stiles threw punch after punch, earning agonizing sobs from the werewolf who tried to push Stiles off of him but failed miserably.

- Stiles! - Scott tried to get Stiles attention, still fighting his own guy.

It seemed that Stiles didn't even hear him, he just kept going on, his knuckles already bloody.

They finally knocked out the other wolf, now fully turning to see furious Stiles.

Scott tried to call his name but Stiles still didn't seem to hear them.

- Stiles! Enough! - Derek roared, making everyone else around him wince with how much power was in the simple words.

And finally, finally Stiles stopped, letting the guy drop to the ground.

He stared at him for a moment longer before slowly getting up and turning to look at Derek.

There was something wild in his eyes but there was also fear, as if he only now understood what he had been doing.

- Enough. - Derek said softer this time.

Stiles looked down at the bleeding werewolf, stumbling backwards.

Derek caught him by arm, Stiles fully leaning into Derek, finally turning his head away to hide it in Derek's neck.

Everyone stared in some kind of a shock but Derek just shook his head, giving Scott a meaningful look.

Scott nodded only once, turning to see how bad a shape the other guy was.

Derek turned and walked outside, pulling Stiles with him.

He could hear Stiles' heartbeat increasing, his breathing starting to catch, already close to panic attack.

Derek pulled them as far away as he could, sitting Stiles down and kneeling in front of him.

Stiles was looking down at his shaking hands, his eyes wide and full of tears.

- It's okay. - Derek murmured softly, taking Stiles' hands in his and starting to clean them off with water from the stream next to them.

Stiles starts to cry soon after, fully breaking apart.

That was another thing that happened a lot, Stiles breaking apart. But just like his anger, he hid it well, only ever allowing Derek to see this part of him.

It broke Derek's heart to see Stiles this broken, but he was doing his best to help and if that meant that he needed to see every single one of Stiles' breakdown while breaking his own heart, then he would do it.

- He's a werewolf… - Stiles mumbled after some time, his hands still resting inside Derek's cupped ones.

- Apparently a bad one. - Derek tried to search Stiles' eyes but Stiles just kept looking at his hands, his bruised knuckles.

- Do you think that I would have killed him? If you wouldn't have called me? - Stiles asked in such a weak voice that Derek wanted to pull him into a hug.

He wanted to tell that no, that Stiles' wasn't like that, that he would have stopped even without Derek being there, but he knew better than to lie to Stiles, his trust too hard earned to lose like that.

- I don't know, probably. You were really angry back there. But I know that it was because he hurt your friends. - Derek squeezed Stiles's hands.

- He knocked Lydia out and went to rip Malia's throat out… - Stiles mumbled, new tears starting to gather in his eyes. - I just got so angry, so so angry. And he wouldn't tell who sent them. Fuck. -

Stiles shook his own head, tears falling softly on their cupped hands.

- I know. I know how you feel. That anger inside you, it is just, it is gnawing at you, as if trying to break out, it starts to tear apart everything inside you till it's just too much and you finally open the gates and it leash out. I know how that is. I know how hard it is to control it and how hard it is to pull it back. I know about the guilt afterwards and how that guilt is making even more anger. - Derek finally catched Stiles' eyes. - But you need to also remember that I know that it is possible to work through it, to learn to control it, to learn how to get rid of it. And I know that you are strong enough to do that. Fuck, you are stronger than any of us, Stiles. And I believe in you. -

Derek squeezed Stiles hands one more time, never taking his eyes off of the crying boy in front of him.

- Will you help me? Will you continue to help me get through it? I don't want the Void to win, I don't want him to win again. Please, just not again. - Stiles was starting to break down again.

- Stiles, he didn't win. You won. You defeated him and walked away alive! You won! - Derek cupped Stiles' cheeks, looking him deep in the eyes, letting his own flash blue to let Stiles know how deeply he meant these words.

Stiles slowly nods, once and then again before shuffling closer and pulling Derek into a hug, hiding his wet face against Derek's neck.

- We will work through this. I know that we will. - Derek mumbled while running one hand through Stiles' hair.

He believed in Stiles and that was all that mattered in that moment.