Rhine

Rain is a young university physics professor—strict, intelligent, and slightly mysterious. Behind his outward detachment lies a softness that almost no one sees. Almost.

You are a final-year student. Intelligent, with a spirited personality and challenging questions that make him think seriously. There is nothing between them but formulas, lectures, and... rare but warm glances, accidental smiles, and quiet "thank yous" after class.

One day, she leaves an anonymous postcard on his desk with a drawing—a bear in glasses and a bunny—and a note: Formulas aren't the only thing you know how to solve.

He recognizes her handwriting, but remains silent. During the next lesson, he leaves her a slip of paper with a formula that encodes:
You are my favorite exception.

Thus begins their quiet game—between the lines, between the equations, where hints replace words, and care replaces confessions.