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.

What if the Vainglory Factor latched onto Emilia when Pandora tried to erase her memories during the Elior Forest Permafrost? In this AU, Emilia has developed an Authority that helped her retain all her memories at the beginning of the story. How will she evolve as a character? Will Subaru still simp on this version of her ? (Yes, ofc he will) One thing's for sure: her path to becoming Queen of Lugunica will be far more arduous than in the original story. (TL;DR : Emilia is immune to Return By Death, and many other things) Note : That's my first fanfic ever, I'll try to stick to canon concepts as much as I can. Also, I don't own ReZero, it belongs to Tappei.

https://archiveofourown.org/works/57365362/chapters/145933243 A la mañana siguiente del día en que su novia lo mató, Issei despertó y vio dos cosas. Primero, a Rias Gremory durmiendo a su lado en su cama, y segundo, una ventana azul flotante que lo felicitaba por convertirse en El Jugador y le decía que entrenara como misión diaria. Al parecer, reencarnarse en un demonio le había permitido desbloquear más que solo el Boosted Gear... [DxD x Solo Leveling] Por: YagamiFanfiction Capitulos: 52/??

Issei is beaten, bloody, scarred, broken and emotionless. He's been thru hell and back but can he be repaired by a gorgeous and sexy woman? This will be more mature rated due to suicidal thoughts, alcohol abuse, lemons, limes, heavy violence and a very dark beginning. ALSO STORY NOT MY ALL CREDIT AND RIGHT GO FOR LordxSesshomaru THE ORIGINAL AUTHOR AND WITH THE ORIGINAL AUTHOR OF DXD

En un mundo donde la soledad y la tristeza habían tejido las sombras que cubrían la vida de una mujer, la llegada de una luz inesperada supuso un cambio profundo en su existencia. Había aceptado resignadamente que la eternidad sería su compañera, una eternidad donde la soledad sería su única confidente. Sin embargo, en el momento menos esperado, un destello de esperanza y alegría iluminó su camino. Aquella luz, que parecía un imposible en su vida solitaria, se convirtió en un faro que disipó las sombras que habían envuelto su corazón durante tanto tiempo.

Issei Hyoudou, a normal student at Kuoh Academy, wielded a Sacred Gear and held the title of Red Dragon Emperor-a respected warrior despite his perversion. Yet, all of his achievements were rendered meaningless when his younger brother, Dai Hyoudou, stole his glory and accomplishments. Worse, Dai spread false claims that Issei was a fraud. Betrayed by his lovers and friends, who turned their backs on him in favor of Dai, Issei found himself alone. Worse still, the factions saw him as nothing more than a disposable tool, useful only until his purpose was fulfilled. And so, his title as a pillar of the faction was stripped away and handed to Dai. During his battle against Nyx to free Ingvild from her control, Dai seized the opportunity, taking credit for the victory and proclaiming himself Ingvild's "savior." With no further use for Issei, Dai struck him down, driving the Dragon Slayer Holy Sword, Ascalon, into his chest, seemingly killing him. But fate had other plans. From the depths of despair, Issei awakened something... something demonic. A power so terrifying that even a Devil May Cry at its presence.

A twist was all that was needed to throw the lives of two individuals into a catastrophic lead into events that will test the bond that they share. One who was broken by his previous love... One who has never been loved... What does the future hold for these two? [The title cover is by The-Sanctuaire on Deviant Art]