The Strongest in Another World with Assassination Skills - I, Who Has Mastered Alchemy and Assassination, Dominate the World from Behind

Late has just accepted an assassination from a strange, mysterious client. To his surprise, it was actually the goddess Mises. A goddess from another world whose existence was on the brink of destruction after her defeat in war. Mises' quest… is to assassinate Masura Dzur, another god in her world. Late, the assassin with a 99.9% success rate, was tasked to assassinate a god in another world?!

(Source: MANGA UP!)