The school disappeared!

A brilliant beginning!
I am so glad, I don't know ANYTHING about this drama, like starting a new book without knowing anything either from the plot or the characters, who's good, who's bad, why this and why that, is this a time slip or space slip, or both... I will have to find the answers by myself while watching it...
One more fact: I MISSED YAMAPI SO MUCH!!! T_T
I should again go back to watching Japanese dramas more...