The World's Finest Assassin Gets Reincarnated in Another World as an Aristocrat, Vol. 5 — Rui Tsukiyo

A wicked plot in the heart of the kingdom! Three demons have fallen, and Lugh wastes no time preparing new tools to handle the next one. Unfortunately, he's interrupted by a conspiracy in the royal capital. It seems someone wants to frame him for murder. Whoever this cocky person is obviously doesn't know who they're dealing with. In the midst of this, another demon appears, and Lugh receives a visit from the goddess who sent him to this world. The discussion with her leaves him wondering if perhaps there's more to why he was reincarnated than he first presumed...