In 1999, 18-year-old high school student Lu Yu suddenly begins to dream of a strange ancient castle, which leads him to uncover a long-buried secret. Along the way, he encounters people belonging to different factions, a body he cannot control at midnight, hidden identities of his family, and friends who are scheming something in secret. Caught inexplicably in a struggle among multiple parties, will he be able to remain safe in the end?

[From Steam]