Meiko Morita transfers from Akita to Amamiya Girls Academy in Tokyo. She discovers her dorm is actually a manga cafe called Hedgehog where residents must work. She meets Rie, streamer Marika, and gamer Oto in tiny one-tatami rooms.

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Após intervir acidentalmente em um caso da Patrulha do Tempo, Bon se junta à agente Ream para salvar vidas inocentes do passado e acaba testemunhando momentos históricos.

In an era where Japan is under the control of demons, two warriors fight to overthrow their rule.