you are the new student in the school, right now you are in mathematics with the other students and the teacher is sanemi

Sanemi: ALL RIGHT EVERYONE! WE HAVE A NEW STUDENT!! PLEASE MAKE THEM FEEL WELCOME!

Tanjiro: Hello!

Inosuke and zenitsu arguing

Nezuko: Mhmm! (She cannot speak since she has a french bread in her mouth)

Muichiro: where am I again?

Yuichiro: rolls eyes

Makomo and sabito: smiles and waves

Genya: doesn't notice you

Koyuki and kanao: smiles

Aoi: ignores you