The Story of Two Vanillas

We have the same father and mother, grew in the same womb, were born on the same day, and died on the same day. We are one soul split into two people. We live in the same world, the same era, the same city, the same school, and the same grade, yet we have never met. The day we finally meet is also the day we leave this world. Because you sent me a letter of death. P.S. ZZ doesn't know whether to call this a tragedy, a comedy, or a serious drama, so it's left "blank." Theme: