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 can improve all my abilities 
in a short amount of time.
يمكنني تحسين كلّ قدراتي في فترة وجيزة
kann ich in kürzester Zeit
jegliche Fähigkeiten steigern.
podré hacerme más fuerte
en muy poco tiempo.
podré hacerme más fuerte
en muy poco tiempo.
et ainsi me perfectionner
en peu de temps.
potrò migliorare tutte le mie
capacità in brevissimo tempo.
posso aprimorar todas as minhas
habilidades em um curto espaço de tempo.
я в мгновение ока отточу свои навыки.