Tate no Yuusha no Nariagari - Chapter 299 - The Last of the Seven Stars

[The Demon King is Dead], a story in which the Demon King got immediately killed in the Prologue. I became the ‘Demon Prince’ of said novel.

…Help me.

After a long slumber, Zhou Yi wakes up in a wasteland era. He discovers that the new humans, to avoid the daylight supremacy of the Guangna species, only dare to come out at night, meekly whispering in the darkness and scavenging for trash. Exasperated, he questions how humans could have deteriorated to such a state. Lamenting that each generation seems to be worse than the last, Zhou Yi decides to show them the ways of the older generation. Embarking on a quest to transform the wasteland, he aims to rebuild the lost splendor of humanity.

All Amy needed to do was get away from her pursuers. The last thing she thought she'd encounter was being kidnapped, drugged and offered to some smelly fat old man.

But no, he wasn't any of that. Zach was simply a god. And he was drugged, just like her. It could be the drugs or she just genuinely found him irresistible. And to her luck, he didn't resist her when she made a move on him. When she found out how much of a beast he was in bed, she wasn't complaining.

But she knew they were not supposed to cross paths. So when she finally left the next morning, little did she know that fate had a 'little surprise' in store.

A Speedster in a Fantasy World