MTL - Little Mermaid Dressed As a Scientist - Chapter 79

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

Vergil, a 21-year-old young man, leads an apparently simple life in a somewhat troubled world. His family is also simple—although his father is no longer alive, his mother has always been by his side, despite being a bit... aggressive. But that's not so unusual nowadays, right?Everything changes drastically when Vergil, after an unexpected death, awakens as a demon. To his surprise, he discovers that he has accidentally married beautiful Pure-Blood demonesses.Now, he will discover how the world really works from a Demon's perspective.

Nikolai gets bitten by a vampire and a werewolf on the same night. Their bites cause his hidden blood to awaken as the first hybrid. He grows stronger by devouring the blood of his enemies and lacks the weaknesses of both races.Despite this, he lives a normal life during the day. While at night, he explores a dark, hidden life, working for a spoilt princess and helping his obsessive friend. One is a vampire—the other leads a werewolf mafia group.Lost in this strange world, he finds help from Eliza, the strange pendant his mother created before she died. This helps him realise the world isn’t what he thought as he faces constant threats and danger from those who despise him.In this new world, his growth is rapid, and with endless possibilities, Nikolai fights for his life and to protect what he finds important while rising to the top.

Lugis is an adventurer who accompanies the Hero’s team party. However, every day he has to fulfill tasks that are not pleasant at all. In addition, he is oppressed by the other members of the group. The only reason he remains on this journey is because of his childhood friend, Ariane. But she is fascinated with the team leader known as Hero. One day a shadow figure appears and tell Lugis, “Let me give you a chance. A chance to redraw your life.” And so, Lugis is given the opportunity to be sent to the past to restart his life.