Natsuki Subaru is summoned to a parallel world on his way home from the convenience store. He's entranced at first by the fantasy world suddenly stretching before his eyes, but the cute girl he believes summoned him is nowhere to be found, and soon enough he's utterly lost. Then a gang of punks surrounds him, but he quickly learns that he doesn't have any of the powers that he thought all people transported to a parellel world should have. Just when he's about to be beaten senseless, a girl appears...
For a shut-in who's gotta guard 
his house, that much is a given.
بالنسبةِ لشخصٍ مُتقوقِع يحرسُ منزله، هذا شرطٌ أساسي
Na ja, ich bewache ja mein Zimmer
rund um die Uhr als Stubenhocker.
Eso es normal para ser de la Guardia
de Seguridad Hogareña, Nini.
Es normal en la Guardia
de Protección del Hogar, Nini.
Normal pour un type reclus
qui protège son chez-lui.
Dopotutto, sono un hikikomori,
ho una casa da proteggere.
Para um hikikomori como eu,
 isso é o mínimo que devo fazer.
Ну, настоящий затворник 
должен уметь постоять за себя.