The Lazy Boy Is, In Fact, the Strongest and Most Brutal Assassin.

In a certain kingdom’s capital, war is approaching.

A young boy named Il, an apprentice guard, is treated as a useless person who can’t do his job properly, living a lazy life while constantly relying on his stepsister.

Amidst this, a certain rumor is spreading throughout the city. It is said that a mysterious group of assassins known as the Night Dwellers are operating in the shadows.

This is the story of the worst assassin among them.

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