Bad News! My Seatmate Disappeared in Chapter One

All of the titles (This Terrible News! My Deskmate Vanished in Chapter One, Outside the Black Tower, Bad News: Deskmate 180, Good News: 250 Jin, Black Tower: Becoming a God from Hyperthymesia) — new users should probably only see the 250-jin one, so it is understandable that many people can't find it!

There is a strange sight in this world, the Black Tower.

No matter where on Blue Star you look from, as long as there is open sight, you can always see its shape.

And its distance from you is fixed: no matter whether you move forward or backward, or wherever you are, the distance between you and it never changes.

My name is Chen Xi, and I am a patient with hyperthymesia.

From the age of four onward, I remember every second that has happened clearly.

One ordinary afternoon, my deskmate Lin Fan disappeared.

The whole world forgot him, except me......

(This synopsis is powerless; please read the main text)