MTL - Age of Empires From Scratch - Chapter 194 Lawbreakers and Missionaries

The cold wind howls across the Northern Wilderness, and Louis Calvin tightens his wolfskin cloak, standing alone atop an ice cliff.As the son of a Duke, he was thrown into this perpetually frozen wilderness under the guise of 'pioneering glory.'When he thought he was at a dead end, the Daily Intelligence System activated:[Thirty-seven ice-bound hungry wolves are lurking in the southeastern valley, planning a raid on the territory tonight.][At dawn, an Ancient God's corpse will emerge from the Ice Lake, with its heart retaining the godliness of winter.][The Church of Gold Finch will deem you a blasphemer, and the Holy Flame Knight Order has set out on a northern expedition.][A tide of the undead will sweep across the continent, with humanity's numbers dwindling to less than a million.]...

Betrayed. Exiled. Murdered. Reborn.In the war-torn land of Glory, power is everything and Duke Merlin's bastard son has none. Cast out to a starving border town beside the cursed Devil Forest, Kaelor and his mother were meant to die quietly.But when assassins take her life and leave him bleeding in the mud, another soul awakens within him one from another world.And with it, something else awakens too...The Fusion System.A power that lets him fuse nearly anything.Fusing one starving soldier with a dead direwolf gave birth to a Dreadwolf Trooper.Fusing one hundred wild dogs produced the monstrous Cerberus.Fusing two crumbling forts created a living fortress bristling with autonomous ballistas.From broken men and dead beasts, Kael will forge an army the world cannot understand and a dominion no one will dare challenge.

Su Shuilian was the first legitimate daughter of a renowned embroidery family, but she was murdered by her jealous family member. After death, Su Shuilian’s soul enters an unknown female body who lives in a dynasty she had never heard of.

While trapped in the wilderness with her wolf pup companions, Shuilian picks up an assassin who was betrayed by his organization and saves him from the brink of death.

After making it out of the dangerous forest, the two travel to a small town with few inhabitants. There, they find a location with a picturesque scenery and disguise themselves as a married couple to buy a house to settle down in.

She was a girl unfamiliar to this world, and he was an infamous assassin. Journey with them as they adapt to their new life…

- Description from Novelupdates

The MC entered the body of the An family eldest son, An Ziran, an arrogant 16 years old boy who weighed 78 kg (~171-172 lbs), who only knew how to eat, play and sleep. Seeing his current body, An Ziran decided his first priority was to LOSE WEIGHT!