High school student Akatsuki Nagaminewho has been playing video games and staying indoors instead of going to school, finds himself reborn as Salva Saku, a nobleman villain in the epic RPG “Deus” series. He sees this as a chance to start his life anew, but the fate that awaits Salva in the original story is far too much: he cuckolds the heroine Ciel, who was in love with the protagonist, kills her to take her power, and is ultimately killed by the protagonist. To be frank, he stopped playing when he was spoiled about the cuckoldry, so he only saw the rest of the story on the Internet. If things continue as they are, the protagonist will kill me after I do the worst possible thing. I need to be strong. But I don’t want to be a Hero and stand out. Akatsuki Nagaminea aka Salva, decides to become the most powerful mob using his knowledge of the game. In the process, he fights against the leaders of the mysterious secret society “The Song of the Circle” who call themselves “The Apostles of the Secret of Fire,” but as a result, he saves the girls by resolving their unfulfilled dreams. Salva is loved and doted upon by the apostles of the “Song of the Circle,” who are all beautiful, yandere girls. The scenario development gradually differs from that of the original story. The heroine Ciel, the heroine of the original story, somehow falls in love with Salva, while Yoshua, the protagonist of the original story, falls into the darkness… Salva’s unique behavior based on his knowledge of the game creates a relationship with the original characters, and Salva, who just wants to be in the mob, is unavoidably caught up in the story… “The strongest mob, I will become!” I was supposed to: ……