レベリング・マーダー ～週に一度人を殺さないと自分が死んでしまうので、それならいっそ勧善懲悪しようと思います～, Leveling Murder - Shuu ni ichido hito o korosanai to jibun ga shinde shimau no de, sore nara isso kanzen chouaku shiyou to omoimasu., Leveling Murder - Since I'll die if I don't kill someone once a week, I'd rather punish evil and promote good

One day, Yamato Onitsuka is an office worker who accidentally kills someone.The sound effect that rang in your head when you took someone's life.And an announcement informing him of his own enhancement and acquisition of spells. --If a ``murderer'' doesn't kill someone within a week, he will die. Onitsuka Yamato, who became a ``murderer,'' a being whose level increases when he kills someone, has decided to survive even if it means killing someone...