Hero Laughs While Walking the Path of Vengeance a Second Time, Vol. 4 (light Novel)

"Summoned to a fantasy world as a hero, Kaito Utage defeats the Demon Lord alongside a band of noble adventurers...only to be double-crossed and brutally murdered by his former allies! But when a twist of fate gives him a second chance at life with all his memories intact, he sets off on a quest to slaughter his traitorous party members one by one. "Come...let vengeance commence!""--