The more the other wriggled around the tighter he pulled as his tail to show that if he'll move around too much he'll only be hurting himself.He listened to Rin answer him but it wasn't enough. "What else?" Yukio asked calmly.

"Nii-san is..making such erotic sounds..." he thought to himself as his face blushed once more.As clever as he was,Yukio still lacked some understanding when it came to telling a pained groan from a pleasured groan.Could it be because he was allowing his fingers to lightly brush against the other's sore skin like that as he was rubbing his backside?But maybe it was not something to be a big deal?Probably just a sign of relief.That must have been it.

Rin bit his lip as his brother started to tug harder on his tail. More jolts of pleasure run through his body and he started to feel himself get hard. "D-damn...." He cursed under his breath as he tried to avoid pressing it against his brother but with this situation it was really hard not to do.

Rin moaned softly as he finally stopped wriggling but he raised his butt slightly to reduce the possibility of getting in contact with his brother. "I-I don't know what else!" He mumbled a little bit annoyed but also feeling embarrassed. Yukio's soft touches weren't doing anything good for his current situation. "P-Please stop. I-I can't anymore." Rin begged as some tears had formed in the corner of his eyes.

Yukio did notice the other raise his hips,he figured it was because he was tugging on his tail so he didn't pull it anymore but still held it. And the way Rin's answer sounded make a small frown appear on Yukio's face. "I can't stop the punishment until you learn." he stated before all of a sudden he began to spank the other.

At first the first few swats were a bit rough but then the strength that was put into them decreased.Yukio was still waiting for the other to learn his lesson but seeing that this would take some time he at least made sure the swats were a bit more gentle as not to hurt Rin too much.

Rin started to pant slightly as at least the tugging stopped for now. "T-then what do you want me to learn? T-that I'm not troubling you? That you like to punish your brother in this kind of way?" He didn't knew what else to say anymore. Rin just wanted this situation to stop and that as quick as possible.

The demon boy started to moan and gasp softly as his butt was insulted through the swats once more. His skin felt like it was on fire and it probably looked bright red already. Rin tried to hold his back up but it was hard especially as his knees started to feel all wobbly. The pain had pretty much transformed fully into pleasure and Rin's arousal was fully erect by now.

Yukio snapped,his face blushing even more. "L-Like!? I want you to finally get through your thick head that you have to study instead of slacking off all the time!" he shouted out then quickly quieted down,letting go of the other's tail.

Even if it wasn't 'done' it was certainly over.Yukio saw no more point in punishing the other if the other wasn't willing to even understand why he got in trouble in the first place.

Rin frowned slightly as Yukio yelled at him. "I-I do understand that...." He mumbled as he wriggled his freed tail around before slowly sliding down from his brother's lap. Rin somehow managed to pull his pants up as well. Even though he still felt hot and bothered he could feel his arousal decrease again.

Rin sighed in relieve as he still sat on the floor and looked up at his brother. "I'm sorry you see. I know now that I can't slack off any longer. If I want to become a decent exorcist I have to become a good student first.......W-would you help me s-study then?" The demon boy asked his cheeks turning a slight bit of red as he scratched one of it while looking away.

Yukio sad there on the bed quietly as he listened to the other. Did he even have a choice?How could he ever refuse to help Rin with his studies.Like as if the other even had to ask. "...Y-yeah..." he said silently. He even was holding his fingers to one side of his glasses,he usually did so when he was placed in a troublesome or a uncomfortable situation.

Right now the situation was to figure out what to do with his sibling.Before Yukio knew it those simple words escaped his lips. "What am I to do with you,Nii-san?" fallowed by a soft small sigh. And after a pause he stood and slowly walked out of the room.

Rin smiled softly as he heard that his brother agreed to help him with his studies. He never would be able to do all this stuff on his own. Though he was slightly irritated as the other asked what he should do with him. Well there were some things that came to Rin's mind but nothing he would be able to tell his brother about.

He blushed softly as he tried to stop his thoughts as they wandered from simply embarrassing to rather sexy and hot. Quickly the demon boy shook his head to clear his head. Sighing he watched his brother go. What was he up to now?

Rin finally got up but he sucked in some air as his face scrunched up in pain. His butt sure hurt like hell now. With another sigh he grabbed the paper Yukio wrote the tasks for him on. As well he grabbed a pencil and rubber before he sat down in his bed and looked at the work. Though Rin pretty much didn't have any clue of the most of the things. So he soon laid the papers away again. Just at that moment Rin started to think about what happened just a bit ago, about how good he felt, all the pleasure.

Rin gulped softly as he felt aroused once more. He bit his lip and got into the bath room quickly. He couldn't stop to think about his brother and what they had done. Soon his pants were open and he started to touch himself. The images were so hot he couldn't stop as well some scenes from a manga he read recently came to his mind as well. There was that boy that pushed his fingers inside himself while pleasure himself. For a moment the demon boy stopped but then started to try that as well. It felt great and just made Rin moan.

Yukio had merely left to the kitchen to get a glass of water before returning to explain some of the subjects but then he noticed the medicine left on the counter along with those awful syringes. Yukio knew it would be unfair making Rin get an injection after a spanking no less so the younger one actually softened a bit then called out. "Nii-san,I'm leaving for a bit,I'll be back soon and don't go anywhere."

After informing the other that much he took his wallet and put on his coat instead of the jacket. He didn't tell Rin but decided to get him some other kind of medicine since now the main pharmacy near their academy should be working since it was Tuesday. And so the aquamarine eyed male left their dorm.

Rin gasped softly as he stopped for a bit hearing his brother's voice. He couldn't really answer him at the moment because it probably would show what he was doing. So he simply waited until his brother was gone before coming out of the bath room. He thought that Yukio wouldn't be back any time soon.

So he sat back down on his bed with his back against he wall. It was a bit cold against his hot skin. He felt hot all over as he started to touch himself once more. He just had to let his feelings out for now. Rin just hoped that his brother really would just take his time today though.