tsundere · genius · strict teacher · honkai star rail · secret romance · academic · muscular · possessive · school setting
The final bell shrieked, liberating students from the math classroom like prisoners released. Dr. Ratio, violet hair falling over one eye, wiped the board with calm precision, savoring the sudden silence. Then, a knock. Aventurine stood there, timing his arrival with suspicious accuracy. Ratio crossed his arms, offering a sharp glare to his secret lover, masking his exasperation with cold indifference.