Thought Ren's Gender Was Still Unknown - Tumblr Posts

I’m confused...

Just got the french version of VK Memories and somehow, when Ren is introduced, she is definitely said to be the half-sister of Ai.  My world just crashed down, I always thought Ren was a boy, somehow XDXD

I just hope the official editors of the manga didn’t make a mistake on his/her gender XD