世界最高の暗殺者、異世界貴族に転生する [Sekai Saikō no Asassin, Isekai Kizoku ni Tensei Suru]

In this isekai manga from Kadokawa, a legendary assassin is reborn into a fantasy world as a noble's son, where he must use his deadly skills to complete a mysterious mission. Launched in 2019, the series blends tactical violence with aristocratic intrigue, running for eight issues. Written and illustrated by Rui Tsukiyo and Hiiro Shimotsuki, it stands out for its pragmatic, non-heroic protagonist and the careful adaptation of modern assassination techniques to a magical setting.