My beautiful suicide

Her brother died. Her parents divorced. Her high school bully is relentless. Cosette doesn't have a lot to live for, but it isn't until she accidentally kills someone that Cosette makes the decision to take her own life. Unwiling to bring shame to her mom, best friend Mattie, or her boyfriend Chris, Cosette decides the best method of suicide is to become a victim of the local serial killer, The Poser. But every time she goes out to find him she gets attacked; her instincts take over, and she ends up killing her attackers. This quickly leads to unbearable guilt. Desperate to finish this before she gets caught of racks up more victims, Cosette does the unthinkable.