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Here's a rough translation of the German parts. I hope that I didn't miss one:
"Good morning"
"I have no intention of calling the police."
"It doesn't matter. I was tired anyway, so I just fell asleep."
"You don't understand German? That's good." (he's talking about taking advantage of their language barrier)
"Just a moment. ...he's not coming. In that case."
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Does anyone know where to read the novel translations? I can only find the ones up to ch. 173...
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https://m.novel.naver.com/webnovel/list.nhn?novelId=765207
It's in Korean but Google should be able to translate it to English
It was an okay story I guess