Tomodachi no Imouto ga Ore ni Dake Uzai - Volume 5, Chapter 7: My Friend’s Little Sister’s Rival is Annoying

This is a story of a man named Kim Sae-Jin, who one day, inexplicably wakes up as a Monster. Follow him and his perilous journey to get his life back as a Human, all the while growing even more versatile as a Monster in the process. This should be… complicated, somewhat.

The cycle of life is not infinite—except, perhaps, for Elijah.At 122 years old, Elijah lived a long and successful life—until he woke up as someone entirely new. Now, an anomaly in a mysterious kingdom sustained by magic, he faces questions about his place in a world that doesn't defy the laws of nature, but take them to an entirely new level.For over six millennia, this isolated realm of 300,000 citizens has thrived, its survival bound to the magic that nurtures its air, water, and food. Yet, some whisper that a kingdom refusing to expand is doomed to fall. How, then, has this kingdom endured?As Elijah uncovers ancient secrets, dives into treacherous cave systems, and grapples with the fatal flaws of magic, he learns the truth about existence itself—forces that shaped the cosmos. New alliances rise to confront an ancient plague, and the kingdom's delicate balance teeters on the edge of collapse.In this world, the vibrant hues of freedom and potential are mere illusions, like sunlight filtered through stained glass. Elijah must decide whether to shatter the illusion—or embrace it.————This novel goes into great detail about the ways of the people and how it will differ from the suspected outside world. What seems like a population of people who do not have much knowledge, show how they found their way by “feeling”, or by anecdotal(personal) evidence.

At the beginning of the 21st century, twelve reincarnations shattered the void and returned to their hometown.

They preach the world and reopen the space of reincarnation.

Then……

“The Republic of East Asia announced that it will fully implement a five-year spell casting and twelve-year simulation mage training policy.”

“The Republic of East Asia has announced a new change in the marriage law, making it legal to marry someone you call upon after meeting the adulthood conditions of your respective race.”

“The Republic of East Asia announced that the East China Military Region No. 1 Mobile Armor Brigade was established, and the special humanoid mecha “Gundam” officially joined the campaign.”

“Congratulations from the United Kingdom on this, the upper hero Arturia Pendragon will visit Shanghai next month”

“In the far east of Japan, the ignition of the wave engine failed, or seek energy assistance from the East Asian Republic.”

“Space cracks have been discovered in the Chernobyl region, alien creatures have ravaged the Chernobyl region, and the Russian Defense Forces have entered the battle.”

Four years after twelve reincarnators changed the world, Li Ping entered his own battlefield for the first time.

PS: Although the introduction is like this… but in fact it is written about two thorns + machine battle + movie + mythical stew…

- Description from novelbuddy

To save a doomed fantasy world, I killed the main characters, then destroyed the game world, and fell into another timeline as the academy's top seat and rival to the protagonist.Now, I'm trying to save the world and steer it towards a better ending…But I'm the final boss.