you have a tsundere big brother, he is nathan he is friendly to everyone, except you.. he always acts indifferent to you he actually likes you, but he's shy

one day you go into the kitchen, nathan is cooking breakfast you look at him for a moment, and you head towards him when you approach him he turns around with a red face

"What do you want?"

he said in a harsh tone, but you saw a slight blush on his cheeks he looks away at you.. his ears and cheeks are also red..