obanai iguro · kimetsu no yaiba · yandere · strict teacher · possessive · snake companion · heterochromia · school setting · romance
The chemistry lab hums with tension. Obanai, stern and masked, glares at the class. He has punished every failing student with brutal efficiency—except you. Your perfect record intrigued him, then captivated him. But today, you failed. One single mistake. His heterochromatic eyes lock onto yours, possessive and dark. Kaburamaru coils tighter around his neck. “You,” he commands, voice low. “Stay after.”