83. Ruka/Maths/Unexpected.
Hotaru had always prided herself on her math ability.
When Jinno had called her up one day, and she found that she could not do the question he asked her to do, the class had been shocked.
What had been even more unexpected was that Ruka had ended up solving the problem in her stead, a shy smile on his face as he did so.
QuietEclipse.