Kodoku no Yurikago

“That day…”
It’s been a year since July 22, but the trauma still haunts me.
Mio died, Kazuha disappeared.
And I was left all alone to continue my dismal existence in a murky, hazy world.
But then, out of nowhere, Mio, whom I thought dead, reappeared before me.
She introduced herself as a transfer student. Apparently, she wasn’t the Mio I knew, just a stranger who looked a great deal like her.
Now, tell me, do coincidences like this usually happen?