Toaru Majutsu no Index - Volume 3, Chapter 3: Railgun. Level5.

[You have awakened with the Lifespan Extraction System!][Extract Lifespan, advance your Cultivation and Cultivation Talent, amass an unstoppable Army of Shadow Beasts, and ascend to the Pinnacle of the World of Immortal Cultivation!]In the Super-Continent of Legaria, a Godlike youngling was born… and abandoned.Scorned and hated by all for merely existing, Zar struggled day in and day out, just trying to survive to see the next dawn. In a world of Intelligent Beasts, he, a Half-Beast, Half-Human—a species alien to the inhabitants of Legaria—had no one to rely on.By some miracle, he managed to make it in one piece to his 15th birthday. A day… which changed everything for him.*Ding!*[Are you ready to become the Ultimate Immortal Beast Tamer?]Fate shall be rewritten!Zar—a lone Godling—shall rise up and make even the most arrogant of God Beasts and Immortal Cultivators relinquish their strength to him!

After a mental patient committed suicide, he was reborn in Tokyo? My brother is in Neon Lanyun?br> Then, the infinite space called him?

“Conquering the world and becoming the king of the world is just my part-time job. My life only exists to seek interesting things and things.”

“Well… at the moment when life dies, the desire for death and survival is intertwined. It’s really unstoppable!”

“Let me… let me… feel something more interesting!”

By the protagonist of being sick.

PS1:

Do you think this is a brainless and harem-covered anime doujinshi?

Do you think this is a novel that is fun to complain, has no morals, has no lower limit, and only sells cuteness and pretends to be stupid?

Do you think this is a dark and curious, bloody, tyrannical and inhumane killing movement?

Oh ho ho (sinister laugh), don’t be so simple.

PS2: “I don’t want to take medicine!” by the protagonist.

PS3: Newcomers and new books, ask for everything, recommend tickets, collections, rewards, etc.

- Description from novelbuddy

After being expelled, the ace soldier Chen Feng returns to the city and inexplicably becomes the fiancé of a cold and aloof campus belle.His life as an extraordinary figure begins by stepping on arrogant second-generation heirs and embracing the goddess campus belle.

Xiao Ze, who was dedicated to the people and vowed to become a generation of Ming Jun, accidentally fell on a little lady.
The little lady was born beautiful and lovable.
So Xiao Ze accepted his life and got the name of fear.

ps:
①The male protagonist has no concubine, and he is dedicated to serving the country.

- Description from novelbuddy