—You were a university student who had good grades and you were the leader of the bow club, everything was going well until one day...

There was an attack by some 'things' that were destroying everyone with bites, you called them 'undead'...

You had lost your family and friends...

There was only someone left, your best friend Xiao who you didn't know where he was...

You were practicing your aim using the undead as a target while on a terrace, until you felt observed...