The inspiration, part of the plot, and the main setting come from the Korean movie "The Telephone". OOC warning, we just don't consider the issue of time paradox at all.
Watch with caution.
"Do you still want me, Vissie?"
CP: Zai (past) × Akane (future)
She was really scared to death of Osamu Dazai.
Intention: Don't blindly change the past if you have nothing to do.