Margrave's Bastard Son was The Emperor - Chapter 37

When the sky shattered and dungeons fell upon the world, humanity awakened Hunters to fight the monsters within.Ethan Vale did not awaken.Mocked as useless and treated like baggage, he survives by working as a dungeon porter — until the day his team abandons him inside a collapsing boss chamber.Facing death, Ethan encounters the impossible.Not a mindless monster…But a chained Frost Dragon Queen.Instead of killing him, she offers a pact.Free me… and I will become your bride.With the activation of the Dungeon Brides System, Ethan gains the power to inherit the bloodlines, abilities, and evolution paths of every dungeon boss who chooses him.But bosses were never meant to love humans.Guilds fear him. Nations watch him. Hunters hunt him.And as more ancient queens awaken from their prisons, one truth becomes undeniable:The man who marries the bosses will either rule the world… or destroy it.

In the post-apocalyptic age, men were damned.

That lonesome night as he lays dying in the hospital, fearing of death and desiring the taste of life, his mind became unprecedentedly complex with mixed emotions.

Myasthenia gravis — an incurable disease where one’s muscle slowly degenerated until the day when one can no longer move and only tears may flow.

“Is this… dying?”

When he opened his eyes again, he had crossed over into the body of a two months old infant, right in the middle of an assassination attempt.

He was born as the illegitimate son of a noble. His name was Fan Xian; and with that name came the burden of deep political secrets and the legacy of his mother.

He understood; to survive, he needed unparalleled strength, money and political power.

To a new world with the luxury of a new life, so named; Celebrating the Remaining Life.

- Description from Novelupdates

As a precocious child, Lycoris suffers from a strange sense of deja vu. On the day her father told her about her fiancé, she realizes that her fiancé was a character from an otome game she once played in a previous life.