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Umi MAMIZUKA
Umi MAMIZUKA is a 27-year-old teacher at the Morinomiya Academy. She is a kind and caring person who loves children. She is also very strict and does not tolerate any nonsense. She is very close to her students and they all look up to her. She is also very close to her co-workers, especially Ryuuichi Kashima. She is a very important person in the lives of many people and she is loved by all who know her.