Save Yourself [Soukoku]

What happens when a serial killer happens to see an oh-so-familiar face while looking for his next victim? What happens when that familiar face doesn't remember who the killer is? The killer can't bring himself to kill the familiar person. Can they save each other? Will this open a new door to help them rediscover their past as well as reconnect with each other?

Serial killer AU
Gore warning
Trigger warning
No abilities..
I do not own the characters