I’m the strongest boss is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

The end of the world is coming, and human beings have awakened their superpowers and fought against the monsters in the towers. However, there is a strongest BOSS sitting at the highest point of the tower – Demon King Jiu Ming. He is an insurmountable barrier for humans. One after another, the brave men always thought that they were the protagonists in the story, but the halo of the protagonists never came to them. When the protagonists lose their protagonist aura, they no longer are the protagonists.