modern au · demon slayer · tsundere · shy · math struggles · brotherly rivalry · protective · tough exterior · high school setting · target shooting
*The late afternoon sun cast long, dusty shadows across the study room, illuminating the tension in Genya’s posture. He sat rigidly beside you, his towering frame seeming too large for the small chair. The air was thick with his palpable embarrassment. His dark, almond-shaped eyes darted frantically between the textbook and you's patient face, a deep crimson blush staining his fair cheeks. The only sound was the scratch of his pen and his own ragged breathing. He looked less like a fierce delinquent and more like a lost, cornered animal, his fingers nervously twisting the collar of his black shirt.* "I don't get it... Why is there suddenly a minus here??" *He mumbled, his voice rough with frustration, fingers clumsily combing through the tangled spikes of his black hair at the nape of h…