Why Am I Being Haunted by Ghosts After Just One Drink?

Because they were drunk, four old classmates began to have the same dream. The air-raid shelter hidden in the abandoned and dilapidated warehouse of the old school, the skeleton in Mao suit, and the old school worker who had been insisting on sealing the Wraith Society's spells. The four of them were unknowingly involved in a cause and effect that lasted for half a century.