Please Don't Let Your Feelings Become a Burden to My Adventures

In the near future, the world is eroded by "emptiness" from the "abyss". This is a kind of pollution that distorts matter, rules and biological understanding. Human civilization retreated to a few "Candlelight Cities" and relied on the "Holy Light Barrier" to survive. … "Just kill them all and everything will be saved, right?" With his clothes barely covering his body, a "miracle" befell him for the first time. He only wanted to kill the "Demon King" and rescue his "princess"