The World’s Finest Assassin Gets Reincarnated in Another World as an Aristocrat — S1 E5 - Qualifications of Assassins

Officially a family of renowned doctors and assassins behind the scenes, the house of Tuatha Dé is the right hand of the kingdom. Trusted to become his father’s heir, Lugh assists his father with his mission. However, there are those who are displeased by Lugh’s success. Lugh defends his status in a challenge against them–