Renkinjutsu to Ansatsujutsu o Kiwameta Ore wa, Sekai o Kage kara Shihai suru The strongest in another world with assassination skills ~ I, who has mastered alchemy and assassination, dominate the world from behind ~ 暗殺スキルで異世界最強 ~錬金術と暗殺術を極めた俺は、世界を陰から支配する~