Fated Mate to the Triplet Alpha - Chapter 7: The Wild Brother’s Heart

Before going to college, an ordinary high school student went to celebrate and got drunk. When he woke up, he found himself in a completely different world. There was a big sect, the approaching sect entrance examination, a slum where his body’s previous owner lived, and a shared memory about a missing young girl.

When he got tangled in a fight with a few punks in this different world, he fell off a cliff and miraculously found himself still alive, with two more voices ringing inside his head. They were Sword Master and Saber Master. In the company of them, he continued to find out more about this whole new world. He took the sect entrance examination, entered the sect, met a strange man in black, and even participated in a major competition of the sect to have a chance to win over his peers!
In this whole new world, he was born again and got to explore the fantastic martial world!

- Description from Novelupdates

Sequel of Allison, taking place about 17 years after the original series.

A military enthusiast with dreams of serving, shaped by his father’s influence and a bookshelf full of war theories, finds himself unexpectedly reborn into a fantasy world he’d recently read about.Now an orphan, he faces impending destitution in a land governed by strict caste systems. But with the Reich Empire Academy Entrance Exam as his potential salvation, he’s armed not with magic, but with a vast knowledge of military tactics from his past life. As the date of his expulsion from the orphanage looms, he’s determined to leverage his unique skills to change his fate.

The impostor Necromancer, with inferior forces, is hunted and rejected by others.The genuine Necromancer, with countless skeletons, becomes a ruling sovereign.After obtaining the Double Doors, Wu Heng discovered that his world was overrun with zombies.Plan A failed, and thus began the implementation of plan B for survival.Wu Heng chose to become a ‘Necromancer.’Summoning undead is forbidden in this alien world? The post-apocalyptic planet is full of potential soldiers.Impossible to survive in a zombie-filled world? Then let me live and learn skills in this alien realm.Hence, an undead army armed with modern weaponry made its debut in this world.A calamity engulfs the world, a million skeletons rise.The Dead Bone Dragon, Undead King.(Double Doors + Necromancer + Magic + Fantasy World + Undead Catastrophe.)