The Demon Prince goes to the Academy - Chapter 4

Yi Zaha. The crazy demon crazy for martial arts. While he was running away after stealing the heavenly pearl of the Demon Cult Leader, he fell off a cliff. After thinking that everything was over, he opened his eyes to see that he had returned back to when he was a waiter… And he is being beat up for something that he didn’t do. The crazy demon who returned to the beginning of his days as a waiter! Will he go crazy again, or will he drive his enemies crazy?

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.

Two years ago, Xu Xuan was the No.1 genius of the Xu Family and was rather famous among the young generation in Cloud City. His mother died of illness when he was a baby and he wanted to be father’s pride. That was why he challenged the person with the much higher cultivation in the martial arts competition.

Unfortunately, Xu Xuan lost. And his dantian was broken by vicious enemy. But he didn‘t reconciled at all. For the past two years, he had but he had persisted in cultivating every morning in the hope that there would be a miracle. However, there is not until he met the superior of Mysterious God Realm who was escaping. After a fierce struggle, Xu Xuan swallowed unique treasure Nine-Swallowing Divine Jade and obtained a low-grade Heaven rank cultivation technique Five Spiritual Arts.

Xu Xuan would never forget the scenes of how the marriage was annulled yesterday, nor the disdainful gazes of others, let alone their smiles after his dantian had been broken. What legendary road will this ordinary boy from the wilderness embark on？

- Description from Novelupdates