Thirdphp

After their city is nuked, brothers John and Sam become victims of war. Sam perishes, but John survives. Now, John's sole goal is to die. Source: MangaPlus

Reiyan Asura, if that is his real name, awakens in a void, bound by chains. He doesn't remember who he is or how he arrived in this world of white. Little does he know, he's been entered with millions of others in a twisted game where only the strongest prevail. Reiyan is anything but strong, but does he have a buried secret that can help him survive? Welcome to the God Game. Prove your worth or die entertaining Him.