DxD: When Cause Becomes Absolute

Hyoudou Issei should have died the night he was betrayed.

Instead, he awakens as a Shared Piece Devil, bound to three masters-Rias Gremory, Sona Sitri, and Sairaorg Bael(Valeria Bael)-and wielding a Sacred Gear that should not exist.

Absolute Causation is not power or magic. It is a law.

Every meaningful action creates an unavoidable effect, converted into Causation Points beyond mana, fate, or divine control.

With the Boosted Gear awakening alongside it, Issei enters a world of Rating Games, devil politics, and supernatural wars-where strength can be challenged, fate can be resisted, but causation always collects its due.