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--
Here is knowledge of the culture and 
technology of the era, as well as the Hero.
هذه معرفةٌ لحضارة وتقنية 
هذا العصر، بالإضافة للبطل
Und dies ist das Wissen über die Kultur,
la cultura y la tecnología de su época
e información sobre el Héroe.
la cultura y tecnología de su época
e información sobre el Héroe.
la culture de l’époque actuelle,
sa technologie,
La cultura e il livello tecnologico dell'epoca,
Aqui está o conhecimento da cultura e tecnologia
da época, bem como sobre o Herói.
А вот знания о культуре 
и технологиях этого времени,