Why not go to JUSCO with me, Valkyrie?

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Once upon a time in the small town of Heikei, Nagano Prefecture, lived a normal high schooler, Seta Rinichirou. On one stormy night, he stumbled upon Princess Paulirefa and the Valkyrie who served her, Kurauzera, collapsed in the middle of paddy field. Both of them had escaped using Gate magic from their country which fell to Orc army attack. And now they decide to establish a government in exile at Rinichirou’s house. Between a jealous stalker childhood friend, Paulirefa and Kurauzera’s fascination with Japanese modern technology and culture, and super-dense Rinichirounium, a slapstick comedy choked with otaku culture reference in the rural Nagano countryside will begin! Also, the people from this world and that world began to visit one after another.