(I've already completed a 700,000-character novel and won't abandon this one. I have a good track record.) (Adventure first, then nation-building. The protagonist may become invincible. Multiple female leads.)
After waking up in the outskirts of Kazdel, Winstrel Crowl was utterly confused. He knew nothing about himself, yet somewhere deep inside, a voice kept telling him, "Your bloodline is bound to Terra." So he decided to go out and see what this land was really like.
The observer from the previous civilization, Wenlai, sets out from Kazdel to explore this land, then eventually returns to it. What will he see? And what choice will he make?
"Life has no distinctions of high or low, noble or base. Whether from the previous civilization or the current one, no one should have to disappear. I understand now. I must make everything endure. It is for the sake of everything that we must endure."
--Kazdel's Sworn Brother, Marshal Winstrel Crowl
That's the serious version. In reality...
Lamalon: "Wenlai, look at me. Look at Ai Fanir. I refuse to believe there's nothing behind those eyes."
Sarkaz onlookers: "Gua! So the princess knocked the marshal to his knees! She must be taking him back to make him her ***!"
Texas: "Wolves hunt. Wolves are patient. Wolves won't let you get away."
Wenlai: "...At first, all I really wanted was to make this land a better place."