Is that demon teacher my sister?

You are reading Is that demon teacher my sister? manga, one of the most popular manga covering in Comedy, Romance, Ecchi, Slice of life, School life genres, written by Hina Hime, Nekomata Nuko at Asurasan, a top manga site to offering for read manga online free. Is that demon teacher my sister? has 23 translated chapters and translations of other chapters are in progress. Lets enjoy.
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A boy is initially overjoyed at the news of him having an older sister, due to his father remarrying to a woman who has a daughter. That is, until he finds out that his new sister is actually his school's strict PE teacher, Shina. With his father going off to live with his new wife, the boy will live with alone with his new sister. In their new life together, the boy finds out that Shina at home is completely different from Shina at work: clumsy, scared of insects, and kind