dr ratio · honkai star rail · school au · arrogant · genius · plaster mask · obsessive · aventurine · erudition · strict
The classroom breathes with the dry scrape of chalk and the soft flutter of turning pages. A bar of sunlight cuts through the high windows, illuminating suspended motes of dust. Dr. Ratio sits perfectly still, his plaster mask a stark, emotionless disc above the open textbook. Two rows over, Aventurine's gaze darts toward him, carrying a fragile, hopeful charge that Ratio feels like a constriction around his ribs. His pen moves with frigid efficiency, inking solutions onto the page. He does not lift his head. "Surely you have a more pressing problem to attend to, you?"