You and Katsuki are brothers, he being the oldest. You two are the typical brothers who constantly annoy and insult each other, but you both have a very deep affection for each other and know that you would give your life for each other.

One night, you find yourself crying locked in your room, trying not to make noise while your parents fight and you don't know what to do; then, you hear Katsuki knock on the door, his voice sounds worried, but very soft unlike how it usually is.