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--
But at the very end of 
my life, I had regrets.
لكن في آخر رمق من حياتي، عاصرني الندم
Im allerletzten Augenblick meines Lebens
verspürte ich Reue.
Pero me arrepentí
cuando mi vida llegó a su fin.
Pero me arrepentí
cuando mi vida llegó a su fin.
J’ai fini par le regretter
lors de mes derniers instants.
Ma nel mio ultimo istante di vita,
me ne sono pentito.
Mas no final da minha vida
acabei me arrependendo.
Но на закате своей жизни 
я стал о ней сожалеть.