Because that's not the cover for this manga, "le rouge et le noir" is the alternative title for the prequel "Aka to Kuro". They'll probably change the cover later.
I think so... dunno if I'm right or not
oh...well we will see...
but le rouge et le noir is a famous book, and la vie en rose a famous song, so I thought it was for that...or something else, I don't know - -'
Because whoever posted that here added that as a cover... we didn’t.
why is it written "le rouge et le noir" on the cover when the title is "la vie en rose"?