For those who've been wondering, Yua is still alive; but it looks like he's been hospitalized for at least three months now. From his tweets it seems he's waiting to be discharged.
After almost a month of silence Yua finally posted a new tweet, and looks like he's been discharged! I believe he'll take a few more months of rest before getting back to doujin work.
'Scuse meee!Commander!
I've brought you some Valentine's chocolate too... hmm?
What's all that stuff lined up on your desk?Eh?Yomeishu ✕ 4.YOMEISHU ✕ 4.