The title reminds me of "Vacation of the Lambs" by Konno Oyuki:
"They are having a quarrel between close sisters, so we are not butting in." Rosa Foetida Hasekura Rei was pushing the core of her automatic pencil, as she put checkmarks onto the printout she was reading.
I am your petite soeur after all
Sachiko-sama returned a smile on her face, delighted that her feelings got through.
"See?" Yoshino said to Shimako. "Not even dogs or bacteria can withstand the smell of sisters' fights."
"I see. What a lesson!"
Yoshino and this mangaka are both invoking "fuufu genka wa inu mo kuwanai" "when a married couple fight, even a dog won't bite."
So Yumi and Sachiko were a married couple and so are Ruby and Weiss.
last edited at Apr 22, 2019 6:02PM