Flame Streamer: Dungeon Avenger

In a modern world where mysterious dungeons have opened and awakened beings explore and conquer them, Enma Akagi was nothing more than a powerless supporter. While his sister Ayumi, an up-and-coming awakened streamer, rose to fame through dungeon exploration, Enma stayed behind the scenes—helping, cheering, and protecting from the shadows. Until one day… they were ambushed. When Enma opened his eyes, the first thing he saw was his sister’s lifeless body, brutally murdered before him. Consumed by grief and rage, Enma is approached by a mysterious demon calling himself Vox, offering him a contract—and with it, a twisted power: The more he’s flamed, the stronger he becomes. Now, fueled by vengeance, Enma becomes an "outrageous streamer", broadcasting his crusade from inside the dungeons, delivering merciless justice to those the law can’t touch, hunting down the unknown killer who stole everything from him.