I was Caught up in a Hero Summoning, but that World is at Peace (WN) - Chapter 2216: Miyama Kaito’s Birthday Celebration Party ⑱

[WSA 2025] To confront the threat posed by monsters and demons, humanity summons a hero endowed with a mysterious system and an unrivaled capacity for evolution. He becomes the last bastion of hope for mankind. However, one of his mistakes gives rise to a calamity far worse than the Demon King.This calamity is conceived in a dungeon, abandoned as a fetus by its mother, and raised by the Demon King himself. Upon the Demon King's death, all the restraints he had placed upon the creature are shattered. Thus, the hero's nameless son begins to lay waste to everything. The greatest calamity the world has ever known is born.

The world dare to ask, what is God of War?

“It is with the flesh dominates the world, fists burst into the starry sky, palms crack the sky, destroy all the way, push the eight wastes and Liuhe horizontally!”

“It is with a brave heart, passing by the bustling, swallowing loneliness, fearless and invincible, eternal immobility alone!”

For both, for… God of War!

This is a young man with a mysterious life experience. In order to obsessively in his heart, he crossed the heavens and the world, traveled all over the world, with a pair of bare-handed stories that tear thousands of legends… The rise of the God of War, all the way!

- Description from MTL

Untolerated by heaven, a boy was restricted by the most powerful spell.

He accidentally acquired a painting inhabited by nine souls that claimed to be immortal.

Then, the legend of a strong young man who violated heavenly principles against the course of nature began.

- Description from Novelupdates

There’s a legendary Bishoujo Game that has become popular among Japanese gentlemen.