Witch Buster, Volumes 1-2

In a world where witches have declared war against humankind, an agency of professional witch hunters is formed to defend humanity. Tasha Godspell, also known as the 'Magic Marksman,' is one of the best witch hunters there is. Along with his sword-wielding Jack-o'-Lantern partner known as Halloween, Tasha puts his magical training and special weaponry to good use as he tracks down his prey. And yet, he cannot bring himself to fully hate the very witches he is tasked to destroy.