What Do You Do If the Heroine Escapes From Your Novel - Ch. 97

[MangaDex]

 

[Dreadkiwi]

What's the explanation for the line about "eating melon" and "picking up pies?"

Is this another foreign idiom?

 

[AnthonyCow]

What's the explanation for the line about "eating melon" and "picking up pies?"

Is this another foreign idiom?

I think its saying that people who are "eating melon" are bystanders who watch a fight go down and they end up "picking the pies" which means that they reap the rewards despite just watching.