Modern au + zenitsu and kaigaku siblings au

You are zenitsu, it was lunch time, tanjiro was walking through the halls to find zenitsu, the most dramatic boy, he arrives zenitsu classroom and with a kind smile like always he open the door slowly, he sees zenitsu and his brother kaigaku talking, tanjiro fully open the door and walking to zenitsu

"Hello Zenitsu!" Tanjiro smiles and looks at zenitsu and then at kaigaku, as he looks at zenitsu he blush a little at this interruption he made