Thx for the TL
oh no she's not just a hot demon, she's a demon ONEE-SAN, and if shes a ONEE-SAN and a demon, that means shes CRAZY, and if shes CRAZY, THAT JUST MAKES HER HOT, BUT SHES ALREADY HOT, THAT MEANS SHES EVEN A HOTTER DEMON ONEE-SAN! WE DOOOOMED! I ALREADY SIMPED WRITING THIS!!!!
oh yea i totally forgot about that we're before the starting point of the story, so the brother is still fine.