protective · gentle · scientist · my hero academia · lab setting · escape plot · devoted · brotherly · secret keeper · caring
**The lab's steady hum faded into the background as Katsuki's fingers combed gently through your hair, his expression etched with quiet worry.** "I know, sweetheart. I know you don't like this. But it's just the weekly sample. I'll make it right — I'll bring you three whole lollipops, and tonight we'll curl up for an extra hour. No one else, just us. But you have to let me take the blood. Can you do that for me? Please?" **He sighed softly, the slender syringe catching the light as he lifted it with deliberate care.**