In a world where humanity's integrity thrives on Mana, a calamity devoid of Mana is discovered by our protagonist...

An ex-hitman gains god-like powers during an apocalyptic clash between the armies of Heaven and Hell. After being cast far away across the universe, he must journey through the cosmos with a group of allies. Together, they save various worlds while searching for a way back to Earth to resurrect his deceased beloved.

This is the main story where the main characters are shown and the current time line plays out the two siblings become alien hunters and they fight for their survival as ophans

The Year 2086. Earth is no longer ruled by humans. More than a hundred alien species walk the planet, though no one can agree why they came. Some arrived as conquerors. Others as slavers. Many as scientists. Humanity was raided, studied, rewritten—its cities shattered and its history erased in pieces. The few humans who remain live among the wreckage, adapting to a world that no longer belongs to them. Over time, something changed. Human DNA responded. From generations of experimentation, trauma, and survival, a new phenomenon emerged—mela powers, abilities born from altered bloodlines and sharpened by struggle. With no governments left to protect them, people banded together. Gangs became families. Families became armies. At first, gangs formed to fight alien oppression. Then territory mattered. Then money. Then power. To control the chaos, a brutal hierarchy was created: the HIT Rank System. Gangs are ranked by strength, influence, and kills. The top ten control the largest territories and decide who eats, who rules, and who disappears. Everyone else fights, bleeds, and dies trying to climb the list. In the middle of it all are Aki and Shiki—two kids growing up too fast in a world that doesn’t care if they survive. They aren’t legends. Not yet. Just smart, angry, and determined enough to keep moving forward while everything around them collapses. But in a world built on rankings, bloodlines, and buried secrets, survival is never enough. Because as the aliens continue to watch… as gangs sharpen their blades… and as ancient experiments begin to surface again… The system is about to be challenged. And kids like Aki and Shiki aren’t supposed to change the world. They’re supposed to die in it.

Long ago, the Earth we live on today was split into two Horizons and Humans developed uncanny abilities known as Deviants. Humans who developed these abilities were launched over The Horizon to the East. The Horizon Project, a system where deviants protected themselves and their side of the world, was launched in response. Almost as if the event was foreseen. This system developed and changed as time went on, resembling a Hero Agency, mitigating chaos all over the East Horizon. Taiga Stelios, the self-proclaimed "Greatest", strives to get his name known far and wide.

After severe wars, humans awakened the gift of magic and magical beings were born as well as kingdoms. having 7 on planet earth, 2 of them were severe rivals, Yondaire and Weanesis. An urban legend said that a young boy is traveling into the unknown, looking for someone and, above all, clues about his past. Between clashes and wars, the planet is about to suffer a wound, the return of that which even the creator fears.

It's about a powerful alien king from another planet who fought hundreds of wars and got kicked out of his realm because he was doing good things for his people so they teleported him to earth as a rabbit and wants to take over a human girl body so he fights the monsters who wants to take over earth

In this world human population is left 30% some unknown creature kill us merciless and we fought them with our technology which we called mecha