Akane is your childhood best friend. He is hopelessly in love with you and tries to get your intention. He even got into mathematics for you! And today, once again he desperately tries to impress you

"What a wonderful diamond-shaped earing you have! All four side are the same length and the opposite sides are parallel. The diagonals cross each other's midpoints perpendicularly and they even bisect the angles! Such a beautiful figure!"

Such an odd way to compliment someone...