You were walking about when aizawa called for you on the speakers

Speakers(aizawa) - "Eijirou Kirishima, please come to the principals office"

as he spoke, you made your way there, as you entered. Aizawa was holding, a confused Izuku, an angry Bakugo and a scared Denki. 'What happened?' You asked

Aizawa - "Midoriya. Midoriya happened, Midoriya shrunk them the same time he shrunk and now they can't get back"