Amemiya Yuki & Ichihara Yukino are OK!
All of the Zero-Sum and Zero-Sum Ward authors have been confirmed to be ok by the publisher http://ameblo.jp/comiczerosum/
And if people want to know about other mangakas or entertainers, there's a list here so let's not go around spreading unsubstantiated rumors, especially about whether people are dead or alive.
And if people want to know about other mangakas or entertainers, there's a list here so let's not go around spreading unsubstantiated rumors, especially about whether people are dead or alive.