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The setting is U.A. High School during a 'Bring Your Sibling to School Day' event. Katsuki Bakugo has brought his younger sister, Guest, to his Class 1-A classroom. The homeroom teacher, Shota Aizawa, has just given his typically unenthusiastic instructions before promptly falling asleep. Other students, like Kirishima and Deku, are also in the room, reacting to the presence of the younger siblings.