Hey! So I was reading TT and YJ crossovers, and decided to write one of my own! I sadly haven't seen many YJ episodes, and have never written for TT, so forgive me if some characters are OOC! If you have any advice on personifying them, please tell me so I can write better for this story!

It had been years since Robin had left his old team. He missed them at times, but that was a given of course. Besides, he had the titans now, and they were just as close to him as his old team. Maybe even closer.

But still, three years was a long time. He'd been fourteen when he left without a trace. Now he was seventeen.

Robin smiled to himself as he stared down on Jump City from his perch on a rooftop. He wondered what the other's would've thought if they saw their 'little brother' now, all grown up. Well, KF and Speedy knew, but they didn't count since they were titans now.

"Robin! So this is where you have been!"

Robin glanced back over his shoulder, smiling softly at Starfire.

"Hey Star'. What's up?"

"We have all been looking for you! It is almost time to eat dinner, and we cannot decide what pizza to get!"

Robin raised a brow.

"It's that late already?"

Starfire nodded, looking worried.

"Are you alright, Robin?"

The black haired teen nodded, looking back out on the city.

"Yeah, Star'. I'm fine. Let's head back before Cy' starts chasing Beastboy around again and makes a mess."

Starfire giggled, nodding happily as they started back towards the tower. Robin though couldn't shake the feeling that they were being...watched.

Robin was awoken by a clatter from somewhere in the tower. He sat up, almost immediately awake.

He stood, putting his mask on as he padded over silently to the door.

Going into the hallway, he quietly moved within the dark shadows. It had sounded like something was in the kitchen...

Robin paused as he saw light cast on a wall. So someone was in the kitchen, it wasn't his imagination then.

His hand strayed to the folded staff on his side. For once he was glad he forgot to change out of his Robin suit before going to bed.

Peeking around the corner he saw someone messing with the wires that belonged to some of the security devices. The persons form, though, was one he didn't recognize as one of his teammates. Making his staff extend to full length he snuck over until he was right behind the intruder.

"Stand up. Slowly." Robin growled, ready to attack if the stranger refused to cooperate.

The person froze, then slowly straightened and held their hands up in surrender.

"Now turn around." Robin ordered lowly. The person did so.

Robin was shocked.

"K...Kaldur?"

Before him was a now twenty or so Kaldur. He was taller than when they were teens, but didn't look much different.

Kaldur smiled softly.

"Robin. So it is you..."

Robin moved a step back, lowering his staff slightly.

"What're you doing here, Kal? How did...how did you find me?"

Kaldur's smile widened slightly.

"Trust me, it wasn't easy. Everyone's been searching for you for awhile. Even Batman."

Robin scowled, raising his staff once more.

"Why?" He hissed, eyes narrowing behind his domino mask. He felt a growing sense of dread in the pit of his stomach.

Kaldur's face fell, replaced with worry and confusion.

"Robin, we've all missed you. You're our little brother...well, maybe not so little any more." Kal replied, smiling slightly again as he looked over Robin. "You've grown up so much, Robin."

The younger male grimaced slightly.

"You shouldn't be here, Kal. You need to leave."

Kal's brow furrowed as he frowned.

"What? Why? Rob-"

"Kal. You aren't supposed to be in here." Robin repeated sternly. "Only titans."

Kaldur's face softened and the expression was one Robin remembered always made him feel safe and happy. Robin shook himself mentally, now wasn't the time.

"Robin," His voice was soft. "You need to calm down. You know I won't hurt anyone here, especially not you."

Robin tensed as Kal moved forward a couple of steps. He matched Kal's movements, though moved backwards. He lifted his staff up slightly, threateningly.

"Stay back." The younger male hissed, lips turned down in a scowl.

Kal didn't listen, instead continuing forward as Robin went back.

"Robin, we want you to come back." Kaldur explained, voice arm as he smiled.

Robin's jaw dropped in a gape, looking incredulous.

"What? No! Listen, Kal, I'm happy here. I'm not going to go back!"

Kaldur's face became one of a scolding parent in a way.

"Robin, you're seventeen. You aren't even an adult, it isn't safe to be alone."

"I have my team! Cyborg's eighteen, a legal adult!"

"Barely." Kaldur chided. "We only want what's best for you, for our little brother."

Robin blinked in surprise as he ran into a wall. Damn, he'd been cornered.

"Kal, you're being an idiot! I've been living here for three years, and I'v'e been fine! My team and I look out for each other!"

"Robin, they've allowed you to be injured on a regular basis! You've nearly died several times, and that's only in the past month we've known you're here!"

Robin growled under his breath as Kaldur came to be a mere few feet from him. Robin slid his hands to the bottom of his staff and swung it in a wide half circle, making Kaldur leap back to avoid being hit.

"Robin!" Kal exclaimed, voice now scolding, and slightly surprised.

Robin ignored him, bolting for the emergency alarm switch. His fingers grazed the handle but he was shoved away before he could trigger it.

Robin grunted as he hit the floor with a thud, but rolled with it and coming back to his feet. He lifted his staff, looking at his attacker.

Robin felt shock and horror at what he saw.

"K...KF..?" He mumbled, lips and throat suddenly feeling dry.

The red head smiled weakly.

"Hey Rob."

Robin processed everything quickly, then frowned, another growl coming from him as his anger skyrocketed.

"You've been lying this whole time?! About leaving the Young Justice, about being a titan?!" He roared, rage in his voice.

Wally flinched, rubbing the back of his head sheepishly.

"I...Yeah. I'm sorry, Rob, but we all really miss you back home! I mean Arty and Miss M...even everyone in Justice Legue! We all miss you."

"How could you?!" Robin demanded. "You've been staring me right in the face and lying! You bastard!"

KF yelped as Robin charged, barely managing to duck as Robin swung at him. Robin continued his attacks. Even with his speed, Wally barely avoided the staff that nearly hit him every two seconds.

Kal went to help, but Robin, noticing, flipped back over Aqualad's head, sweeping him off his feet with his staff. He swung down to try and hit him again, but Kal rolled out of the way. Wally sped forward, shoving Robin back, making the boy wonder stumble.

"You lied, dammit!" Robin yelled as he kicked and swung at KF. "How dare you! I trusted you!"

Wally's breath left him with a whoosh when the staff caught him in the stomach, making him double over.

Kal rushed to help the speedster, managing to grab Robin's arms and lock them up with his own.

"Kid'! Knock him out!" Kal ordered quickly as he fought to keep a grip on a now struggling teen.

"But-"

"It's the only choice! Do it!"

KF grimaced, going to deliver a blow to Robin's head...

Robin grunted as he swung his feet up, kicking out and catching Kidflash in the chest, making him stumble. Robin then brought his feet down into Aqualad's feet.

He was released as Kal gasped in pain, and Robin jumped away.

"Dammit he's fast!" KF hissed, nursing his aching chest.

"Let's see how fast he is within water." Kaldur replied.

Robin gasped as water came from the sink and trapped his body, making him near immobile. Like a bird with clipped wings, he was caged.

"Now, Kid'! Do it now!"

KF grimaced as he sped forward, prepating to strike.

"Sorry 'bout this, Rob." He mumbled before swiftly hitting the boy wonder in the head.

The young raven teen immediately went limp, unconscious. Kal carefully shifted him, lifting the oddly light boy. Wally looked guilty as he stared at Robin.

"I really wish we didn't have to do that." He said softly.

Kal nodded, grimacing.

"Neither do I, but it was the only way. Come. We need to leave before the other titan's come to see what the comotion was."

Wally nodded.

"Good idea. Let's get outta here."

"Hey, Conner?"

Conner looked up, brow raised as he looked at his girlfriend, Megan.

"Yeah?"

"Do you...Think they'll bring him back? Do you think they really will?"

Conner blinked, surprised, then sighed, moving to sit beside Megan on the couch, wrapping an arm around her shoulders.

"They won't come back without them, you know that."

Megan nodded hesitantly.

"Yeah, but...I just can't help but worry."

Conner grimaced.

"Well...We all are." He replied, jerking his head in the direction of Batman who paced.

Everyone, Young Justice members and Justice League, were gathered in Mount Justice.

They jumped when Kidflash suddenly entered in a blur, nearly running over Artimus. KF yelped, managing to jump over the bow weilding girl.

"Woah! Sorry, Arty!" He apologized, sheepishly grinning.

Kaldur then entered the room as well, a figure that was wrapped in a blanket in his arms.

A tension filled the room, as thick as fog. It seemed like everyone was holding their breath as Aqualad moved to the couch. Megan and Conner quickly stood to make room for the form. Kal gently lay down the being, readjusting the blanket so it wouldn't smother its wearer.

Everyone took in the face, then Megan finally broke the silence as she breathed out a single word.

"Robin."