Ansatsu Skill de Isekai Saikyou: Renkinjutsu to Ansatsujutsu wo Kiwameta Ore wa, Sekai wo Kage kara Shihai suru

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 exsistence 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: Square Enix)