Kyousei Teki ni Slow Life!? ~Yudan Dekinai wo Aikotoba ni, Game no Sekai de Ganbarimasu~

I am Gilbert Orto, the second son of Viscount Orto, a member of an aristocratic family in a corner of the Kingdom of Franmecia. I had grown up normally, but when I turned 4 years old, I realized, "This world is the same game I played many times before I was reincarnated, 'Eugene's Miracle'!" Moreover, there was no demon king. I wonder if it's the world of a sequel after clearing it? That game had a guaranteed loss event, and it was terrible. This current situation that only I know is not the time to live a leisurely life, and I can't let my guard down. We have to acquire knowledge and strength from the age of 4 to survive...!!