MTL - Mage Network - Chapter 1548 : Extraterrestrial Model

This is a story about the protagonist getting the system, going crazy in the biochemical apocalypse, producing aircraft and tanks, destroying zombies, saving good people and killing bad people.

- Description from novelbuddy

The countries of Mephius and Garbera have been waging a war for ten years and are trying to put an end to this long fight through a political marriage between the two royal families. Orba, who was driven from his home because of the war and was forced to become a gladiator, looks exactly like the crown prince of Mephius, and it has been decided he will be substituting him during the wedding ceremony. On the other hand, Vileena, the princess of Garbera, has secretly decided to ensnare the crown prince for her own country’s interests.

“Here you go, this is your wage for the week.”After passing over a small pouch, the woman with her legs crossed behind the desk casually made a 'Check' in a notebook and then, without looking up, waved her hand to dismiss him and said:“Remember to file your taxes... Next!”“Wait a minute!”After pouring out the coins from the pouch and looking at the eight large and one small, totaling nine filthy coins in his palm, Leon couldn't help but widen his eyes in shock, almost wanting to pounce on her and fight to the death right there and then.“Damn it! I just repelled the evil god who was trying to erode the world this Tuesday! You bastard even wants to deduct the salary of the savior?”

The strongest Hero in history, Nakamoto Keisuke.

He was summoned to another world in the spring at the age of fifteen years old, and when he successfully defeated The Demon King, he was already thirty-two years old. He had finished his role in another world and returned to Japan, but the reality that had been waiting for him was, “Middle school graduate with seventeen years of blank period” label. He couldn’t find a decent job and had no choice but to spend his days working part-time.

Before such a Nakamoto, a beautiful girl who self-proclaimed had come to return the favor, appeared. “I’m the reward for Hero who had defeated Demon King”, said Angelica, a girl who came from another world that persistently tempted Nakamoto to make her his wife. Together with a high school girl who looks like Elsa, his beloved girl that he lost in another world, Nakamoto with his cheats skills got caught in a harem life.