all of dev's family are dead
it went by kind of fast and they didn't show it but they mentioned it in dialogue that they had died
（￣へ￣）
In chapter 18, at the end Dev reunites with Noah, who tells him, that his mother and sister were both dead, and he mourns them in chapter 19.
The author didn't bother to tell us how or why they were killed.
That is the one point I didn't like in this story, Dev was desperately looking for them, but their death was just something that happened off-screen between two chapters - the end.
Wait a minute is Dev family Dead or not the mother and sister