My Returned Older Brother Is Acting Strange

[Two Male Leads + Light Infinite-Flow + Rule-Based Horror + Supernatural]

[World-weary, aloof younger-brother-obsessed top × outwardly cold, inwardly passionate and obsessive bottom]

The moment Chen Shiyi saw his college entrance exam score, the weight on his mind finally lifted. Just as he was about to stir up trouble, a line of text appeared on the ceiling:

Rule One: No swinging indoors...

Chen Shiyi: ?

And so began his journey through one dungeon after another.

Fierce-looking supernatural beings, bizarre rules, taboos hidden in the river of time, and mysterious powers pulling the strings from behind the scenes...

When dungeons collapse, when a child's body appears, when a figure in a photograph comes into focus, when a house is swallowed by flames, when the truth buried for years is revealed...

Whose obsession lies behind that sealed-away past?