In a world where there are gates to mysterious dungeons and heroes who enter them and defeat the monsters within, Izuku once entered a dungeon which was never seen or heard of, a 'Double Dungeon'. In it, events happen and Izuku gets the power to level up! What happens next. Read to find out. Under rework. Reworked chapters marked with (*). Ever wondered what it would be like if Deku had the power of leveling up from the manga and light novel 'solo leveling'. In this he gets the power of the protagonist of 'solo leveling'. This might spoil some details of the manga to those who haven't read solo leveling. also...sorry if it gets a little dark sometimes. The art and drawings shown are not mine. My hero academia belongs to Kohei Horikoshi and solo leveling belongs to Sung-Lak Jang. I only own this plot.

Issei, an average teenage boy who peeps on girls with his two friends. However, overtime he started to get bored with everything he has been doing. Endless peeping, getting beaten up, getting in trouble, and not being popular. He needed something else in his life, a fresh start. The next thing he knew, there was a screen that said... [Welcome, Player.]

Izuku's parents had cool quirks. His mother has a rather weak Telekinesis, but it was useful for a number of tasks. His father can breathe fire. He could have been a popular hero if he'd wanted to, but he'd never aimed for it. Izuku got potentially the worst combination of those powers. Smoke Manipulation. A terrible power for a hero wannabe. Especially when your already arrogant underclassman got a cool quirk like Explosion.

This will be a reaction fic where the characters will be watching Subaru's adventure in their world. Spoilers for the anime and the novels. These characters are Arc 5's characters. Season two will be in here along with Director's Cut season one and some OVAs. Special thanks to Wishful Witch on reddit for the cover art. Enjoy!

ram falls in love with subaru! but subaru loves emilia, so will she be able to steal his heart? lets find out!

Waking up to reality with the view of a system, the stats that he could see described his powers. Issei died to only be revived once more to see the world in a different view. This view was the supernatural world... the same world that killed him.

Antares, after dying to the hands of Sung Jin Woo knew that he lost to Death, even Destruction Incarnate lost to Death in human form, After he closed his eyes, a purple sky greeted him, along with the laughter of a woman.

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.