Koko wa Ore ni Makasete Saki ni Ike to Itte kara 10 Nen ga Tattara Densetsu ni Natteita - Chapter 271 - Battle of the Dragons

As a loyal disciple, Ye Chen dedicated himself to guard the spiritual medicine field for his sect. But, during a fight with enemies, the spiritual field was destroyed. His loyalty and dedication to the sect could not save him. The loyalty he thought he had obtained from his peers and lover, could not save him from betrayal. Thus, he was shamelessly banished from the sect. With the help of a flame falling from heaven, Ye Chen began to develop himself into a stronger cultivator. Battled against his opponents, unfolded his legendary life and rewrote his own story…

The young lord of a small and weak country saves a dragon beside the sea one day.

I exist in the darkness, disappear under the bright light, and will eventually devour the sun and turn into the shadow of all things… Known by people as the indescribable terror of darkness; the king of shadows; the dark day; the existence of the shadow of the world , is still just a somewhat special high school student, facing a weird death game…

- Description from novelbuddy

When she woke up again, she found herself become a peasant’s wife…