Hourglass (mxmxm) Hourglass

Felix is a normal twenty year old guy.
Well as normal as you can be if you had spent most of your life locked up in a mental institute.
Because Felix had visions about the future.
A horrible apocalyptic world where humanity nolonger existed.
But there was nothing he could do about it because nobody believed that it was real, not even he himself did.
But when he meets two other patients that claim to have similar powers as him, he starts doubting himself and agrees to flee with them in order to find out the truth.
What follows is a wild hunt for the truth about the end of the world and there place in it.