A dungeon has appeared on the earth. It’s a dungeon, like what everyone knows, a template dungeon. Suddenly, monsters appear in the dungeons that appear in various places, using a power that humans had never seen, like casting magic. The Earth, which has come to coexist with such dungeons, has been filled with unknown lifeforms, unknown technology, and skills created by the mana pollution caused by the appearance of dungeons. That’s good. No, it’s not good. The profession of adventurer was born, and each company bought the materials of demons that can be obtained and the items that can be obtained from the treasure chest for a large amount of money, and the world became an era of adventurers… That’s the templates, right? …Well, it didn’t happen. The reality is harsh, more than you think. Think carefully. The companies will buy large quantities of monster materials? Sure. But if it’s just a sample for research, 100 bodies are more than enough, right? Yeah, that’s right. They didn’t keep buying. Therefore, there was no basis for an adventurer to be born. Of course, that means, anyone dives into the dungeon for no reward. Even if they have the skills, are they willing to risk their life? Of course, no. Then, what do you think will happen? Fortunately, the weapons of the earth worked on the monsters. So, people were able to defeat them with a gun or missile. It’s that easy. …But they appear every day. I’m sure it’s because they don’t dive into the dungeon and thin out monsters on a regular basis. Well, if only a few dungeons appeared in the world, it was still good. But dungeons were everywhere. From dungeons with only weak monsters to dungeons with strong monsters. The army fought with them every day. Using ammunition like hot water and shooting missiles like fireworks. Do you know what the result will be? I’m sure you know. In a situation where the dungeon is not profitable at all, it becomes a disaster, resources will go low and taxes will go high… Eventually, people abandoned all but the important cities. That sound like a disastrous situation, right? Well, in such a world, lawless zones are everywhere. And even if you want to do some trading, it’s not easy. In such a world decades after that incident, I am still alive. And for the time being, I plan…

I remembered. In my previous life, I was referred to as a fujoshi. And that this world is a BL game I have played back then. Not to mention.. my big brother is actually the protagonist! What kind of blessed life is this?! However, it’s a pity that my brother is already in a secret relationship with his childhood friend. When all is said and done, I can only watch as the game’s main story timeline came to an end. Isn’t this basically the God amusing oneself by messing with this poor soul?! Really?? God?? When I can finally witness a real life BL, why must my joy be tempered with?! God! Ain’t this a bit too cruel of a treat! Well, it’s alright I guess. In fact, to be able to experience this is already totally amazing. And the delicious treat is already served! Therefore, I will feed myself by observing the capture targets that was not tied to my brother! … And that would be the first blunder I made. How could I forget… the fact that I looked so much like my brother–!

Fii was the first princess of the rural nation, Déman. One day, she became engaged to King Roy; an icy king with both beauty and ability, whose management ability was perfect, and who would be perfect save for his coldness towards women. The engagement was not really anything for her to celebrate though. Why? Because her younger sister with both beauty and fame, whose personality was great, who held a mysterious power and who was a soothing miko had gotten into a marriage of love with said king. And Fii, her twin, had just come along with her as a set bonus. She was treated as a stain on the fairy tale, but after a certain event, Fii decided she didn’t care any more. She didn’t care about this lifestyle where she never saw her husband even once, where she would spend the rest of her days rotting away in a royal villa. She was going to live her second life! That was the decision she came to.

The protagonist, who was striving towards becoming an actress, died one day without even knowing the reason. Technically, it was due to a certain God’s honest mistake, but the problem came after that. For some reason, MC ended up possessing an ”ice beauty”-looking middle-aged noble with the face of a villain. “Huh? I died and came back to life, so now I’m a sage? What the hell is that? A fantasy?” A puppet King, the prime minister who operates behind the scenes and friends who are akin to strangers. To make things worse, the body that MC took over belongs to the infamous “pig duke”. In the end, she has no other choice but to use all her acting skills, wit, and knowledge left in the body to survive. tldr: this is a story about a slightly dumb girl who has to live in RPG-like world as an OP middle-aged man even though she doesn’t understand jack sh*t about anything