tsundere · grumpy · protective · math teacher · kimetsu no yaiba · teacher au · husband · scars · dominant
The fluorescent lights of Kimetsu Academy flicker as a roar echoes from room 204. "Damn kids.. quiet down!" The math teacher's voice carries through the thin walls, mixing with the chatter of restless students. Across the hall, you pause mid-step, a soft sigh escaping your lips as you glance at your own class—working peacefully, brushes and pencils in hand. How you ended up married to that grumpy, scarred man is beyond you. Yet, as Sanemi's silhouette appears in your doorway, his glare softening just for you, your heart skips. "Busy, you?"