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Twin sisters, the main plot is, no, anyway, I don't know what I should do in the follow-up, oh, whatever, let's see how I write it.

There is no male protagonist. The female protagonist is a foodie who wants to sleep but doesn't want to do anything. She is a slacker. The plot is to travel to the end of the world and is bound to an unknown system. She does this and that, and she also has to take care of the customers.