It Is Our Duty to Revive the Infinite Glory

When I opened my eyes, in the cold and damp back alley, a translucent prompt box told me: Welcome to the Fourth Holy Grail War! Become the master at the beginning, my dear, who is playing house? Fortunately, my "infinite travel system" is not for nothing! The top swordsmanship [Life Two Sword Style] is close to me, and the taboo [Dark Arts] can be used casually. What's even more outrageous is that there are actually two beautiful elf ladies who were once demon kings. They are directly bound to their souls and become my sword and teacher! The system has only one requirement: survive, and then—restore the glory of Infinite Stream! As a hardcore unlimited veteran, I know these routines very well! Rule? Test? Doesn't exist! I chose to flip the table at the beginning! Regardless of the "evil in this world" or the master and servants, in my script, they are all experience points! The first target is the perverted murderer Ryuunosuke Usumu who performs human sacrifice in the back alley! Listening to the extremely disgusting chanting behind the door, without saying a word, I kicked open the so-called explosion-proof door! While everyone is still playing "Summon Servants, Be Careful", I have already picked up my sword and am about to start my unparalleled performance! Where is this Holy Grail War? This is clearly my personal show! But don't think that's the end! This is just the prologue of my infinite flow legend! The curse of the Holy Grail War, the blood-devouring Demon King, the power of the God-Slayer, even the secret of the Star Grail, the last words of the heavens... What kind of truth is hidden in this system? Why did it choose me? Those vast multiverses, I am here!