[Western Crossover] Building a Magical Society from Scratch

[This novel will enter VIP status on February 22, with a ten-thousand-word update that day~] I was just playing a game! Nobody said playing games could make you transmigrate! A certain savior sighed. A certain Earth's consciousness hadn't expected it either. It had meant to summon a seasoned savior, but got one who was all theory and no practice. No big deal. I'll leave everything to you, Savior! Gudao: No Long story short, a certain Earth's consciousness swallowed a few fragments of other worlds to ascend, but ended up with indigestion. Or rather, the fragments clashed. One victim: What was I supposed to do? I was desperate, too! I checked, and they were all fragments from technological worlds. Who could have guessed that one of them was hiding a supernatural world underneath? Once the fusion started, I couldn't pull it back out! One Master: ...We're professionals. We won't laugh. Unless we can't help it. Pfft. The savior sighed. Oh, well. Since I'm already here, shouldn't the Throne of Heroes at least do something? Earth's consciousness: I'm purely technological. Do you think I have one? Master: ? Earth's consciousness: I believe in you! Master: You mean I have to create an entire supernatural world myself? Can't do it. I'm out! Earth's consciousness: I can let you use secret identities! Master: ...I'll think about it. Heh heh. Hard to say no to that. The newly appointed savior, shoved into the job, walked down the street. Superman in a red cape flew overhead, a giant screen played Iron Man's coolest moments, and an angel and a demon disguised as humans sat on a garden bench nearby. This is what they call the technological side? Earth's consciousness, you lied to me! His vision went dark, and he seemed to glimpse an endless future of overtime. At some point, the creatures lurking in the shadows reappeared in the human world. Dead Apostles, demons, skeletons, evil spirits... Along with them came priests and nuns of the Holy Church, wielding sacred powers, and mages of the Mage's Association, using all kinds of magic. And then there was the mysterious Master of Chaldea, before whom they all bowed their heads and willingly pledged their loyalty. One Master: It's me, it's me, it's all me! They're all my secret identities. Heh heh heh, let's get that father-daughter love triangle going! Let's fire off some cool Noble Phantasms! I'm Chaldea's one and only Master, the savior of humanity, the Servant's Master, and the puppet master behind the Mage's Association and the Holy Church! Later, the Master awkwardly discovered that all their secret identities had minds of their own! They'd witnessed the whole time as the Master acted like a drama queen and stirred up trouble, and even offered commentary from time to time... The Servants: Dear Master~ Having fun? Gudao, who thought he was just an ordinary person: ??!! The Servants: So this is the kind of thing Master likes. You should've said so! When we get back to Chaldea, we can have all the fun we want! Anything goes~ The Master, wishing he could turn back time: No way!!! All of you, forget it! Aaaaaah! Tragedy! Don't ask. It's social death, and I regret everything!! Gudao is doted on by everyone, with no romance. The Servants are secret identities first, and real afterward. It's the Gudao from the game, except his memories are sealed, so he thinks he's playing a game. Warning: The timeline is a complete mess!! Lots of original headcanons!! Some parts of the setting have been changed. Theme: Human will can overcome fate