Demon Boss in the Human World - Chapter 38

One day, I – a high schooler – found a paperback in the hospital. The “Disease Coexistence Journal” was its title. It was a diary that my classmate, Sakura Yamauchi, had written in secret. Inside, it was written that due to her pancreatic disease, her days were numbered. And thus, I coincidentally went from Just-a-Classmate to a Secret-Knowing-Classmate. It was as if I were being drawn to her, who was my polar opposite. However, the world presented the girl that was already suffering from an illness with an equally cruel reality…

The best-selling, award-winning debut work by Yoru Sumino:

“Bestsellers 2016 (Overall) by NIPPAN” – 4th Place

“Bestsellers 2016 (Paperback Fiction) by NIPPAN” – 1st Place

“Bestsellers 2016 (Overall) by TOHAN” – 5th Place

“Bestsellers 2016 (Literary Books) by TOHAN” – 1st Place

“Bookstore Grand Prix 2016” – 2nd Place

“DA VINCI BOOK OF THE YEAR 2015” – 2nd Place

“Bestsellers 2015 (Literary Books) by TOHAN” – 6th Place

As of May 2017, this book has sold over 1.2 million copies.

Martin was a succubus who perished at the hands of the Sun God, struck down by a single divine arrow during the epic war between gods and demons. Meanwhile, Martin, a Ph.D. in literature and a seasoned movie enthusiast, lost his life in a car accident in August 2023. By some cosmic twist of fate, the souls of the two Martins converged within the chaotic currents of time and space, merging and eventually settling in the body of an eleven-year-old boy named Martin Myers, living in Los Angeles in 1996.A world without spiritual energy? Fortunately, as a succubus, I don’t need spiritual energy to cultivate; all I need is the essence of desire. Emotions—joy, anger, sorrow, and excitement—are all desires. As long as these emotions are directed at me, they can become fuel for my growth. Alright, let’s see what reliable ways exist in this world to stir people’s emotions en masse. Hmm, becoming a writer—sounds promising; and music, that could work too; but wow, Hollywood movies! They have a global reach; this is perfect! What’s that term again? Right—“Idea Recycler.” I’ll start with writing, but the ultimate goal is to become an international movie star. Acting skills, you say? Don’t worry—I’m a succubus, after all!Disclaimer: I do not own the rights to this novel. All characters, settings, and plot elements belong to the original author and copyright holder. This work is shared purely for entertainment purposes, with no intent to infringe on the original creator’s rights.

A good-for-nothing man married a beautiful girl but was kicked off the bed on the wedding night. Furiously, he wrote a bill of divorce and ran away.
He was schemed a car accident in which he nearly lost his life. However, it turned out to be a blessing. He swallowed the soul that passed through the outer world, thus obtained superb medical skills and martial arts.
Later on, with the silver needles and invincible martial arts, he embarked on the road of counterattacks and was committed to his great dreams.

- Description from Novelupdates

Kyoukai Senjou no Horizon chronicles the story of a futuristic civilization returned to Earth after constant warfare hindered them from traveling beyond the post-Apocalyptic Earth. At this stage, a small archipelago called the Divine States were the only hospitable land on Earth. In order to regain the space-faring technology they had lost after many years of war, they decided to recreate history with a book called the Testament as a guide.

It is the year 1648 in the Testament Era. Toori Aoi, Chancellor and Student Council President of the only academy on the airborne city-ship Musashi, faces the ten-year anniversary of the death of his childhood friend Horizon Ariadust in an accident. As he prepares to celebrate the occasion by proposing to P-01s (an automaton who looks exactly like Horizon) he discovers that his suspicion about P-01s’ appearance actually has a basis in truth; P-01s is in fact Horizon Ariadust, reborn into a robotic body. In addition to this, Horizon’s emotions had been stripped away and are now stored in eight powerful weapons called the Mortal Sin Armaments; which are now in the possession of key people in various established countries in the Divine States.

To retrieve the emotions of Horizon Ariadust, Toori Aoi along with his friends and allies begins a crusade against different obstacles as key events in history are recreated in a futuristic manner.