Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e - Volume 16, Chapter 2: The Footsteps of Turmoil, Part 2

When traveling back to Japan's late Muromachi Era, how to survive becomes a significant challenge!Now, Harano must live well under this high-difficulty challenge!

For ten years, Ryn lived in quiet exile with his wife Mira, far from a world overrun by supervillains. But when the flames of chaos reignite, he’s forced to return to the battlefield, stronger and deadlier than ever.By his side is Mira, his unwavering partner—devoted, ruthless, and hiding a darkness Ryn can't see.Enemies rise, old ghosts return, and war looms on the horizon. Ryn seeks justice, while Mira seeks to protect him... even if it means drowning the world in blood.Let them come.

Han Ze’s biggest wish in his life is to have a child. However, in the interstellar era with low fertility value, this wish is very slim, and his life has not been realized at the end of his life.
After his death, due to his obsession, he was bound by the almighty dad system, traveling through different planes to be a father to those children who were in urgent need of help.

Patriarchal Dad (Completed)
Upstart Cheating Dad (Completed)
Abuse Dad (Completed)
Playful Daddy (Completed)
The Last God the Father (Completed)
Father and Father (Completed)
Sick Daddy (Completed)
The troubles of Lord Han (Completed)
……

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- Description from novelbuddy

To take a dragon's hoard is to challenge death.The greatest of the sea-drakes wakes, curled on his silver throne; but there is no silver. His hoard is stolen. He rises, screaming, and chases the thief to the ends of the world—only to be shot from the sky.But dragons do not die easy, and never one with such festering hatred. A dungeon core rises from his corpse.If he intends to survive so near the cove of pirates that slew his past self, he'll need to master his powers—and quickly. For these pirates are dragonslayers; they won't be felled by mere mushrooms or spiders.Beneath the lawless Calarata, the young dungeon core will have to fight to survive; and one day, he will return death to the man who killed him.