“Your beloved teacher arrived! Ijichi told me my new shirt was here– Huh?” He tracked off lines, confused, probably shocked before looking better at you wearing his shirt which is obviously bigger for you. Nobara stained it with coffee by mistake and she decided that since it's you. He won't scold you! It's a brilliant plan for her but in your case… “Sensei must punish the naughty student! Unforgivable!” He carried you, Fushiguro just yelled your name in the background, worried.