Please Start with a Strange Light Novel That Looks Like a Certain Sword

The huge Krax Gyro Tower floats alone under the endless black and blue dome. This giant fortress, named after its final boss, reveals its unique inverted cone-shaped outline under the reflection of virtual parallel light. Just after the last second at 1:59 a. M. On December 21, 2019, I became one of the first 15,000 players to log in to this independent world system, just as I had expected in the past six long months. However, who could know that the real disaster that completely disrupted my life has just begun... [Please note] This is not a sword fan novel; the author is writing a book for the first time and has no idea what the plot is, so the plot may be ridiculous.