AΩ: Reincarnation of the creator of the heavens
Itsuka is known to be an ordinary boy, at least that's what his classmates and the entire Kingdom of Flare believe.
One day, while Itsuka is eating lunch on the school rooftop with his friends, the school catches fire and explodes, killing all students and teachers and reincarnating them into a new world.
Excited by this new life, Itsuka and his friends soon face betrayal. Under the command of the first princess, his comrades turn against him after he interacts with the fourth princess. As a result, during a raid in the Atoma labyrinth meant for leveling up, they betray Itsuka and his friends, causing them to fall to the deepest part of the labyrinth. This incident kills his best friend and gives his other friend amnesia.
Struggling with his emotions, Itsuka walks to the final level of the labyrinth, where he encounters and becomes the holder of DeathxLife. Half of its power goes to Ray Skyrish, his amnesiac friend, transforming Ray from male to female. After dealing with Ray's gender change and the power of DeathxLife, Itsuka defeats and tames the labyrinth's final boss, who transforms into a beautiful dragon girl.
Escaping the labyrinth with his new allies, Itsuka enrolls in a new school in this world, the same one his previous classmates now attend. They believe Itsuka and his friend perished in the Atoma labyrinth, which was officially deemed an accident.
From here on, Itsuka seeks revenge while creating a low-profile background character at school. Secretly, he is Death, the leader of the Death Pieces, an organization he forms that becomes a significant threat to the Flare country. Unbeknownst to many, he is actually Itsuka Yagami, a student at Akura Academy and a former victim of Mitsuri Mine, the first princess of Flare.
Check out the first chapter—you might enjoy it! If you do, keep in mind that the main character, Itsuka, is a badass and likely has a harem of more than ten members. Enjoy reading!
Average Words per Volume 1 Chapter: 1500-3000, though Chapter One of Volume One has over 5000+ words for it's recreation debut.