A/N: Sorry, this is kinda late, but I hope you enjoy. And thank you for your reviews, follows, favourites.

Disclaimer: I do not own anything.

The next day, Naruto decided to take both Sasuke and Kyuubi to work with him. He felt his father would know something about Kyuubi and the strange marks.

Naruto made it Sasuke's job to watch Kyuubi. Kyuubi wasn't too happy, but he let Sasuke carry him around.

Soon Kyuubi settled on just resting on Sasuke's head. He figured that he didn't like being cradled like a baby.

Naruto saw Kyuubi lying limply on Sasuke's head.

"He's not heavy Sasuke?"

He slowly shook his head, watching out for Kyuubi.

"He's small, but he's not that small. Don't be afraid to just carry him if you get tired."

Naruto looked at Kyuubi so that he understood as well. Naruto didn't want Kyuubi causing any trouble for Sasuke.

"Well, he's going to have to get off for a little bit."

Naruto reached out to grab Kyuubi, but he simply jumped off of Sasuke's head, looking a bit smug.

Naruto ignored him and took Sasuke to his closet. They walked inside and Naruto took out Sasuke's yukata.

"I'm taking you to work today, so you're going to have to wear that." He handed Sasuke the dark blue yukata.

Naruto stripped Sasuke of his sweater, since Sasuke didn't make any movement to do so. Naruto made sure to quickly put Sasuke in his clothing so he didn't get aroused from him.

Sasuke looked good in it. It fitted him nicely. As they exited the closet, Kyuubi went up to Sasuke and climbed his yukata nimbly. The fox laid himself on Sasuke's head, between his ears.

Naruto couldn't help but think how cute they looked. Sasuke's ears were slightly bent from the size and weight from Kyuubi, but Sasuke didn't seem to mind.

Kyuubi himself was more comfortable this way. Sasuke's ears supported him from slipping to the side. He was able to just lay there without any effort.

"Let's go."

Sasuke grabbed his cat but was stopped by Naruto.

"Leave it at home Sasuke."

Sasuke sulked and clutched it to his chest stubbornly.

"What if you get it dirty? Or you lose it?"

That was all Sasuke needed to hear to leave it. He placed it on Naruto's bed and followed Naruto out of the room.

Naruto went downstairs with Sasuke trailing behind. He made sure Sasuke put his sandals on before leaving.

Both Sasuke and Kyuubi fell asleep on the way there. Sasuke was leaning Naruto, while Kyuubi laid on Sasuke's lap.

They both were woken up by Naruto when they reached the building.

Sasuke held Kyuubi as if it was his cat. Kyuubi struggled, but he was too weak to put up a fight. Sasuke didn't even realize Kyuubi was struggling, being too sleepy to notice. He rubbed his eye with one of his hands while yawning.

"You okay Sasuke?"

Sasuke looked up at his master and nodded.

They walked into the building and Naruto immediately searched for his father.

"Father?"

"I'm in here Naruto." He heard his father's voice in his office.

When Naruto entered, Minato had a surprised look on his face.

"Is that the hybrid you bought?"

"Sasuke, his name is Sasuke."

Sasuke slightly bowed in respect.

"He's cute." Minato simply stated, but then he saw the fox Sasuke was carrying. "Is that..?"

"Yes, it is."

Minato saw the nine tails the fox had and could only come up with one answer.

"Kurama?"

Naruto sighed.

"We had a fight, or something like that. And he turn into a fox, and I got these marks on me." Naruto lifted his shirt to reveal his stomach. "Do you know anything about this."

Minato told his son to take a seat and offered one to Sasuke as well.

"When your mother first found Kurama, we immediately saw the power he held. He was very young and mature, but he didn't know how to contain his powers. I'm sure you know this, but because of the experiments he was put under, he started to hate humans. It was really hard to get him to trust us.

"This is new to both of you, but we did our own observations on you, Kurama. We found something in him that would transform him into this form he's currently in, but it was ultimately a useless transformation. It made him powerless.

"We were afraid he'd use his powers against humans again, so we put a seal between you two. This was when you were just a baby, so you don't remember anything. Kurama might though, but since he's never took the form of a fox, it wasn't very obvious what we were doing.

"The seals purpose was to create a bond between you two, that is, when the seal's been activated. We noticed the tension between you and Kurama after the incident."

Minato swiped at his own cheek, talking about Naruto's scars.

"We were afraid you guys were not going to get along, since there's around a seven year age difference between you guys.

"But anyways, the seal was to prevent Kurama from using his powers too much. I'm guessing you already saw some of his power. But since it's the first time, the seal activated once he used his power with some bad intent. When he turned back to normal, the seal will weaken, meaning that if he were to use his powers to his advantage, it would take longer for it to activate."

He gave a weary eye to Kyuubi.

"Even though I'm telling you this." Minato was talking more to Kyuubi. "That doesn't mean you can abuse it."

"How come you tell us this now though?" Naruto asked.

"I didn't want you guys to live differently. If I had told you two, Kurama would have to live knowing that. But since it already happened, it's best for you to know."

Kyuubi was a little annoyed at Minato. He huffed and looked elsewhere.

"How do we turn Kyuubi back to normal though?" Naruto asked.

"I'm not sure myself." Minato confessed. "But it really depends on the bond between you too. The faster you understand and support each other, the faster he'll turn back is what I'm guessing."

Minato then turned his attention to Sasuke.

"Is he sleeping?"

Naruto looked at Sasuke as well, and he was indeed sleeping. Maybe it was a bad idea to take him to work, but he didn't want to leave Sasuke home alone.

"Sasuke?" Naruto lightly shook Sasuke.

Sasuke woke up startled, forgetting he was sitting up. He accidentally squeezed Kyuubi due to the shock. Sasuke looked around, he wanted to go home. He didn't like being here.

"Naruto, you can leave for today. Sasuke here, doesn't seem comfortable." Minato's sharp eye noticed the distress the kit left.

"Are you sure?" Naruto asked.

"Yes, I'll give you paperwork to do at home."

"Alright."

Naruto went over to Sasuke and stood him up.

"We're going home Sasuke."

Sasuke looked up at his master, his eyes were glazed. He stood up and hugged the unexpecting Naruto, dropping Kyuubi in the process. Kyuubi had an annoyed look as he managed to land on his feet.

"He seems very attached to you." Minato watched the exchange between the two.

Naruto laughed nervously. He pried Sasuke off of him. Sasuke stubbornly tried grabbing his master again, but settled to holding his master's hand.

Naruto took the papers his father gave him and said his goodbyes and thanked him as well.

On the way back Sasuke cuddled on Naruto's lap. Naruto kept thinking how strange Sasuke's behavior was.

"Hey Sasuke?" Naruto continued when dark red orbs looked up at him. "Are you okay?"

Sasuke sat up. He didn't know. His whole body felt hot, but at the same time he seeked the attention of another.

Naruto looked at Sasuke's eyes, and it almost looked like it was covered in hidden lust. Naruto shook his head. Maybe he was imagining things.

Before they went back home, Naruto stopped by the clothing shop to pick up Sasuke's briefs he ordered on the phone. He hoped that it fitted Sasuke, since he did his best to guess Sasuke's size.

When they finally reached home, Sasuke excitedly went to the door with Kyuubi in his arms. He waited for Naruto to bring out his keys and open the door. When they entered, Kyuubi escaped from Sasuke's hold. Sasuke was upset that Kyuubi left, but he looked at his master.

"You're really strange, you know that Sasuke?" He patted Sasuke's head.

Sasuke's face turned pink at the touch. He ran upstairs, not knowing what was happening with him. His heart was beating out of his chest, and he could feel the heat on his face. He laid under his master's blanket, hiding himself.

Naruto made his way upstairs and saw the lump on his bed, under the covers.

Sasuke peeked his head out and pouted.

"What's up Sasuke?" Naruto sat next to him.

Sasuke laid there and played with Naruto's fingers. He was just happy to be back home.

"Ah, that's right. Try on the briefs I bought you. You can change back to your sweater if you want too."

Sasuke lazily got off the bed to see what his master bought him. Sasuke stripped himself from the yukata, wanting to wear the sweater more.

Naruto mumbled a curse at the sudden naked kit. He quickly handed Sasuke the dark blue piece of clothing.

"There's a hole for your tail in the back." Naruto reached over and lightly grabbed Sasuke's base of his tail to help him guide it.

"Nngyah..!" Sasuke yelped out at the touch.

Sasuke collapsed to the ground, gripping himself. He had no idea what was happening to his body.

"Sasuke?! I'm so sorr—" Naruto saw Sasuke's body and felt himself blush.

Naruto instantly got up and went in his closet. He started searching for a sweater for Sasuke to wear, afraid he won't control himself.

The only one he could find in his frantic search was his old bright orange sweater. He then got out and tossed it at Sasuke's head.

"Wear that..please." Naruto huffed.

Sasuke's eyes were glazed over once again. A strong feeling of lust came over him, something that has never happened before.

He clumsily put the sweater on and then tried finishing the job on his briefs that were half on.

"Does it fit okay?" Naruto asked, looking away.

Naruto looked back at Sasuke, so he could see Sasuke's nod.

"Good." He mumbled.

Naruto peeked at Sasuke, but he noticed something very off.

"Sasuke." Naruto lightly gripped Sasuke's chin and so he could face him.

Sasuke's face was red, his eyes were glazed over, and he was lightly panting.

"Are you sick?"

Naruto placed his hand on Sasuke's forehead, but didn't really feel much of a temperature.

"Sasuke, I'm going to call Tsunade. She's a doctor." Naruto became slightly worried. "I'll be right back."

Naruto went downstairs to his landline. He dialed Tsunade's number and waited for her to pick up.

"Naruto? What do you want." A voice came from the other end.

"Ah uhm." He started. "I actually need you to come here for a little bit."

"Why's that." She sighed.

"Sasuke, a hybrid I bought little while ago is not feeling too well. I don't know what's wrong with him."

Her voice got low.

"I am a human doctor Naruto. I don't treat hybrids. Take him to the vet if he's not doing well."

"He's not a pet! And you're the only person I trust."

"No."

"Come on! I know you study anything you can get your hands on, so I'm sure you know something about hybrids." Naruto pleaded.

Tsunade sighed, getting Naruto's hopes up.

"Fine." She angrily mumbled. "But it's going to cost you extra!"

"Thanks Tsunade."

"Damn brat." Naruto heard her mumble before the line went flat.

Naruto went back upstairs to see Sasuke collapsed on the ground.

"Shit!" Naruto hurriedly went over to Sasuke and picked him up.

Sasuke was still up, but he was trembling. When he felt his master touch him, he felt those places get extremely hot. He tried moving away from the blonde, but he his body felt weak.

"Sasuke, she's going to come soon, so just wait for a little bit."

Sasuke nodded.

It was about twenty minutes later that Naruto finally heard the doorbell ring.

He went downstairs to open the door for Tsunade.

"Where is he." She demanded, not wanting to waste time.

"He's in my room upstairs."

They both went upstairs, where Sasuke was awaiting them.

Tsunade bent down and listened to Sasuke's heart beat. She touched him in a few places that made him squirm around.

She then sighed and got up.

"That's it?" Naruto asked.

"He's in heat." She simply stated.

"What..? Hybrids..go in heat?" Naruto was a little angry at the fact humans made them go through that.

"Not all, but it depends." She sighed. "Did he just turn a certain age or whatever."

"Yeah his birthday was on July 23."

"It happens right after a certain age. That age is different for every hybrid. Some don't even experience it. I'm guessing it's his first time, due to how sensitive he is.

"First symptoms are listlessness. They tend to space out. They then start seeking out the attention of others. Of course, like I said before, it's different for each hybrid, but the first time is probably the most unbearable one.

"He's going to be in pain until it goes away. He's extremely sensitive and soon he'll try seeking a 'mate' if you will, to relieve himself. But since he doesn't have one, either you yourself take care of it, or you find someone he can have sexual intercourse with."

She got up to leave.

"I can't believe you called me all the way over here for me to tell you he's in heat. I'll be sending the bill to you later."

"I didn't know they could go in heat." Naruto mumbled.

"Well now you do. I'm leaving. Goodbye Naruto."

Tsunade excused herself down the stairs and with a slam of the door.

Naruto looked at Sasuke who was currently sitting upright, gripping his own arms. Sasuke had to be relieved, but it was only through sex. Was this Naruto's excuse?

What am I going to do?