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...
I mean it, though. I can't do 
anything to thank you.
لكنّني جادّة حقّاً، لا أستطيع فعل شيء لأشكرك
Aber ich kann dir im Austausch
wirklich nichts geben.
Pero, en serio,
no puedo agradecerte con nada.
Pero, en serio,
no podré darte nada a cambio.
Tu n’auras vraiment rien en retour,
je te préviens.
Però dico sul serio. 
Non potrò fare nulla per ringraziarti.
Eu estava falando sério, no entanto.
 Não posso fazer nada para te agradecer.
Но мне и правда нечем тебе отплатить.