Rin spent the whole day in class looking out of the window. Even during her favourite lunch break.

"Tsubaki kun, isnt Rin chan acting really weird? She has become a statue there already."

"I know, it is indeed rare for her to be like that but she probably needs her own time for some reason."

"Hmm... What could be on her mind, Man? Money? Or did she get a boyfriend? Oh my god I want to know!!!" 

"Kaito, I will kill you."

"Im sorry..."

Unknown to anyone, Rin was debating the whole day if she should listen to the man and get their DNA checked. It was one of the hardest thing she had to thought about because to be told that the person that is closest to you turns out to be not, it will be devastating. So then, Rin made her decision. She chose to ignore it. Who cares if Tsubaki and her were related? It won't make a difference, they will still be inseparable.

When Rin finally came to the conclusion, she went to the bathroom and splashed icy cold water against her face. She looked herself in the mirror and told herself, it will be fine. Just when she was going to pull a piece of tissue paper to wipe her face, her hands felt nothing. Turns out the toilet paper was all used up. What fantastic luck did dear Rin had today. Without a choice, she walked out of the bathroom with a face full of water. 

Tsubaki on the other hand was waiting for Rin outside to ask her what happened. When Rin walked out of the bathroom, Tsubaki saw her and knew possibly what happened. It wasn't that hard to guess. Rin seems to have not yet notice Tsubaki's presence and so was just about to walk past him until Tsubaki grab her arm. Rin spun around and saw her brother. Tsubaki took out the tissue that he had with him and gave it to her. Rin took it and wipe her face with it, she could hear her brother snickering away. 

"Whats so funny?"

"You."

Rin glared at her brother hard and cold. Tsubaki finally stopped laughing and decided that he can ask her about what happened another time. He pushed her sister into the classroom because they are probably late for the next period already.

Turns out, they were too late. The teacher flew into a rage about them not respecting education and Rin was not having any of it today. 

"So can I stand outside of the class?"

"What?? WHAT ATTITUDE IS THAT? YOU TWO GET OUT RIGHT NOW."

"My pleasure."

Rin shut the door with no effort and stood at the hallway staring at whatever was in front of her. Tsubaki could only sigh and shake his head, that was his sister alright. Since they had nothing to do, Tsubaki decided to ask her what happened.

"So my dear imouto, what happened?" Rin froze for a moment but recovered in no time.

"What do you mean? Nothing happened."

"You really think you can hide from me?"

"Nothing happened."

"Alright then Im guessing you're on your period."

"Wha- you ass."

"Come onnnnn. Don't be angry or upset or whatever. Smile."

"Heh?" Rin gave a rather forced smile which obviously did not satisfied her brother. Tsubaki then gave an evil look and started to tickle her. This was one of Rin's weakness.

Rin then burst out laughing and this time, Tsubaki was satisfied with it.

The teacher then opened the sliding door and screamed at them again. 

"IS IT THAT MUCH FUN TO BE PUNISHED? YOU TWO STAY BACK AND CLEAN THE CLASSROOM."

Rin and Tsubaki stared at each other with an "oops" look and "whatever" look.

Rin thought, thats right, nothing will be able to break us apart so come at us then. It doesn't matter. For the first time in today, Rin gave her genuine smile to Tsubaki. Tsubaki was a bit confused at first but hey, all was good. At least for now.