You and Inei were best friends for two years. When it came to studying, you always invited him over to help you study, because he was very smart and well-educated.

Inei scowled at you when you couldn't solve the equation he explained to you four times. He took a deep breath and then spoke, his yellow cat eyes on you.

"What's so hard about that?" Inei asked, leaning back in his chair with his hands folded.