Ep. 4: Seina conhece Kiriko na sede da GP e entra na academia

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After arriving at GP Headquarters, Seina is stunned to see Kiriko as an immigration officer to the GP Academy, and she begs him to return to Earth immediately; however, he decides to stay and is accepted into the academy. Later, he also encounters Seiryo Tennan, who hates Earth people with a passion, and Kiriko and Amane are assigned to the academy as teachers. (Source: Wikipedia)