Sekai Saikou no Ansatsusha: Temporada 1, Episodio 2

The world's finest Assassin accepts the Goddess' request to assassinate the Hero. After defeating the Demon Lord and saving the world, the Hero will then use his power to destroy the world. The Goddess wants the Assassin to be reincarnated in another world and assassinate the Hero in order to save it. After being betrayed and killed by his client in his previous life, the Assassin accepts her offer in order to relive his life in a new world, but--.

Sekai Saikou no Assassin Sekai Saikō no Ansatsusha Isekai Kizoku ni Tensei Suru Sekai Saikou no Ansatsusha Isekai Kizoku ni Tensei suru 暗殺貴族 Sekai Saikou no Assassin Isekai Kizoku ni Tensei Suru Ansatsu Kizoku