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--
I see. As for your instructions 
to kill him within eighteen years,
فهمت، بالنسبة لتعليماتك بقتله
خلال 18 عاماً
Verstehe.
Ya veo. En cuanto a que debo
matarlo dentro de 18 años,
Ya veo. En cuanto a que debo
matarlo dentro de 18 años,
Je vois.
Comprensibile.
Compreendo. Quanto às suas instruções
para matá-lo dentro de 18 anos,
Понятно.