Ochikobore Eji Minarai no Shounen. (Jitsu wa) Saikyou Saiaku no Asashin.

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.
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**Links:**
- Alternative Official Raw - [Niconico](https://manga.nicovideo.jp/comic/66455)