Is Busou Shinki Based On A Video Game?

Willa Roane dies the same night she catches her boyfriend in bed with her sister. Instead of waking in peace, she’s dragged onto a ghostly bus and informed—by a mocking intercom—that she’s entered the Survival Game: a twisted show where the dead are thrown into lethal, terrifying worlds for the cruel amusement of an unseen audience. The rule is simple: survive each round… or your soul is erased forever. Her only ally is Corvin Thorne, the devastatingly beautiful stranger who yanked her off the road and onto the bus. A hybrid vampire–werewolf with a past soaked in blood, Corvin is bound by a wicked secret contract to keep Willa alive… or forfeit his own soul to the game. As they descend deeper into the nightmare realms—from a monster-ruled Dracula Castle to ruined neon cities—Willa realizes she is the key. The deadly worlds are twisting around her darkest fears and fantasies, turning her own horror stories into elaborate traps. She isn’t just a player; she’s the author of the chaos. And the man sworn to protect her may be the only thing she can’t control. Now Willa must rely on the dangerous man she’s falling for, a man who swore he would never love again. The heat between them is undeniable, but as their bond deepens, it’s impossible to tell which is more dangerous: the monsters hunting them… or the love that could destroy them both. Love might be beautiful—but in this game, it’s never sweet. It’s a weapon, a weakness, and the one thing that might rewrite the rules of Hell itself: desire. ---

When the Supreme God of Heavens disappeared, the gods of the Greeks, Norse, Mayans, Egyptians, Chinese, and many more sent their young mortal champions to a magical world in order to participate in the Game of Heavens and Earth on their behalf to win the divine throne. However, the young mortals used their powers, weapons, and tools that were bestowed upon them to form themselves into guilds and create a paradise for everyone. To any kid from Earth, an exciting adventure and new beginning await them, and Sam Roche is one of those lucky chosen ones — or is he still unlucky? Since everything is in peace, Sam tries to build a new life in the City of New Beginning while hiding his dark secrets from his new friends about the sins he committed back on Earth. Eventually, Sam and his friends discover that the strongest guilds have long controlled the paradise, and their rivalry might spark a war that will engulf the land. Wanting to get away as much as possible, they decide that they form their own guild and leave the city. However, a powerful guild is threatening the fragile peace of the magical world in order to win the Game of Heavens and Earth. Sam must either run away to save himself or become a hero to save not only his friends but both worlds.

The throne is threatened as Thalisse, a humble village on the outskirts of Apharoth is attacked. Since the king had no heirs, there was no one left to save the royal family from being overthrown. In desperation, the king declares Gairoshi, an ancient practice where the next king will be selected through a series of duels. Bold men from all around the world flock to the center city to participate and try out their luck in this tiring and grueling competition. As different characters gather for this prestigious event, from the nobles, mighty men, people from the shadows, and down to the Thalisse victims, they cross each other's paths and fate reveals that there is more blood to Gairoshi than they expected.

Evy was a simple-minded girl. If there's work she's there. Evy is a known workaholic. She works day and night, dedicating each of her waking hours to her jobs and making sure that she reaches the deadline. On the day of her birthday, her body gave up and she died alone from exhaustion. Upon receiving the chance of a new life, she was reincarnated as the daughter of the Duke of Polvaros and acquired the prose of living a comfortable life ahead of her. Only she doesn't want that. She wants to work. Even if it's being a maid, a hired killer, or an adventurer. She will do it. The only thing wrong with Evy is that she has no concept of reincarnation or being isekaid. In her head, she was kidnapped to a faraway land… stranded in a place far away from Japan. So she has to learn things as she goes with as little knowledge as anyone else. Having no sense of ever knowing that she was living in fantasy nor knowing the destruction that lies ahead in the future. Evy will do her best to live the life she wanted and surprise a couple of people on the way. Unbeknownst to her, all her actions will make a ripple. Whether they be for the better or worse.... Evy has no clue.

300 years ago, humankind created their own nightmare. Demons, are originally humans but the lust for power changed them inadequately, this is humans own doing. Around 300 years ago, a large asteroid bombarded the earth's very ground. This is the beginning of the birth of demons. This meteor was large, but out of the blue, a mysterious lifeform is intact in it's very core. A human named Cruzius Akiyoma was intrigued when witnessing these menacing looking creature. He interpret this as a blessing from heaven. He then owned the creature and conducted an experiment. He was surprised when he saw the structure and building blocks of life of this creature. He obsessedly pictured this as a one stepping stone through human evolution. He extracted the DNA of the creature and modified it in able to merged it to human DNA. Without any hesitation he then merged his DNA to the DNA of the creature. He is willing to offer his body to attain his goal, thus sacrificing his body is necessary. After the merging, he was surprised because nothing in particular happened. But, he suddenly felt a surging power circulating through his body. He screamed in pain as his body is gradually changing. Darkness fell upon humans as the scream of the first demon engulfed the sky, seas, forest, and fortress.

A 25 years old boy named John is suddenly shot by his friend, which results in his death, but is reincarnated again as the new Demon King. Unfortunately, he agains dies in a battle. This time also he is reincarnated but as a human. Follow Vis' adventure as he gets revenge, becomes a demon and makes his own harem.