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Second season of Kimi to Boku no Saigo no Senjou, Aruiwa Sekai ga Hajimaru Seisen.

A great war has raged for years between the scientifically advanced Empire and Nebulis, the realm of the witches―until the youngest knight ever to receive the title of the Empire's strongest meets the princess of the rival nation. Though they are sworn enemies, the knight is taken by her beauty and dignity, and the princess is moved by his strength and way of life. Will the fighting between them ever be allowed to end?

Yuuta, Yuuki, Shun, Kaname and Chizuru continue being friends as they become 3rd years in high school. Their everyday life is full of misadventure in both school and love.

The story revolves around four teens - the good-looking twins Asaba Yuuta and Yuuki, the effeminate Matsuoka Shun, and the class head Tsukahara Kaname - who have known each other since early childhood. While they are not necessarily good or bad friends, they continue to hang out well into high school. The half-Japanese transfer student Tachibana Chizuru joins the circle of friends in this comedy about the everyday life of adolescence.