At this school, your rank determines your fate—and falling to the bottom can cost you everything.
At a prestigious high school where students are ranked through a cruel card-based hierarchy, status can change with the flip of a card. Azusa once held the highest position, but after a sudden reversal of fortune, he finds himself at the bottom of the social ladder and at the mercy of classmates who were once beneath him. As alliances shift and power becomes a weapon, Caste Heaven is a dark BL drama exploring obsession, manipulation, social cruelty, and the dangerous consequences of giving people unchecked power.