Arifureta Shokugyou de Sekai Saikyou (WN) - Chapter 395

A story following a young hunter named Jay. He has grown up in a world where dungeons, monsters, and humans with leveling systems are a cultural norm. At the age of 20, he awakens a skill that allows him to steal the abilities of monsters. While others are stuck with a specific skill set, he continues to grow stronger after every battle.

Follow Jay's journey as he learns more about his unique situation in a world that's grown blind to the real dangers of modern-day dungeon diving.

[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.

In 2036, humankind steps foot on Mars for the first time.

“Missus, time to fulfil your duties!” Mu Yuchen demanded as he pulled Xi Xiaye closer with his arms intimately wrapped around her waist.

It was a meticulously planned feast for the powerful. Her fiancé had knelt down on one knee and proposed to her sister instead. Robbed of her right to her inheritance, she was prepared for the Xi family to throw her to the wolves.
As she slipped away from her family that had turned their backs on her, she found him — Mu Yuchen, the low-profile and reserved noble that ruled City Z and led Glory World Corporation.

“Mu Yuchen, let’s get married!” He looked up at her, then suddenly stood up.

“Where are you going?”

“Let’s go. Any later and the civil affairs bureau will be closed.”

- Description from Novelupdates