Negative Happy Chainsaw Edge

From SCX-Scans:

Eri Yukizaki is a girl who fights. She is a “pretty soldier.” Her foe is the evil Chainsaw-man, who doesn’t die even after being slashed. If he isn’t defeated, the world will have no future. “I was wrapped into this battle, and my life has changed completely…”

A “non-stop” negative youth story!

Author: TAKIMOTO Tatsuhiko
Artist: SAIKI Junichi
Status: Ongoing
Genre: Action, Comedy, Shounen, Supernatural