Obsidian

"I hate classes so much."

"Only idiots say that, Sul."

"You're only saying that because you're smarter than me!"

"No, it's because you're just stupid."

While Sulia gloomed on her desk while rubbing her face on it, Tulia was putting away her stationary and notebook into her bag.

"Can you put away your things already? Ben and Eis might already be waiting for us outside."

"But it's still too early, and it's too cold outside to hang out there if they still haven't arrived."

"Open your coat, I'll put the thing on your chest so you can stop complaining."

When told to, Sulia unbuttons her coat and showed her inner clothing to Tulia.

"How come you can do it and I can't?"

As Tulia slides her fingers over Sulia's clothing, Sulia felt a bit envious of her twin being able to do something that's unknown to her.