At the Beginning of the Demon Slaying, I Turned Out to Be the Hidden Boss

[Unlimited streaming + games + all the worlds + decisive killing + exciting battles + comprehensive comics] This book is also known as "All Heavens Play, This NPC Is 100 Million Points Strong" and "Everyone is an NPC, why are you so awesome" In the long dark night, evil spirits roared. Under the golden Holy Grail, the heroic spirit was trembling. In the buried memory, nothingness turns into a nightmare! Above the grand world, the soul is crowned king! In the world of demon slayers, he is an unknown water-calling swordsman hidden among the demon slayers, but he makes Muzan scream repeatedly with his exquisite swordsmanship. In the world of Fate, as the eighth heroic spirit who "accidentally" arrived, he wandered under the Holy Grail of Sin and carried out the mystery throughout. During the war, he became a prisoner in an undersea prison, but "accidentally" witnessed this epic war. I can't understand what the three admirals of the navy are! I am the pinnacle of the world, and I am proud of the destruction of the world! … As a player wandering around the major worlds of "Myriad Realms", Shi Yuqiu began to play NPCs in the world after experiencing a death countdown. But he has been troubled recently. Why did he become a hidden boss when he clearly didn't do anything?