A person is in Type-Moon, goes out, and then picks up an Outer God girl?

This book is also known as "It's over, I'm surrounded by the outer god girls!" "I have General Duanmu, who can fight against the old and the young" "Duanmu, you are more outer than the outer gods!"
Duanmu Ye, who accidentally opened "Black Holy Grail: Old Days", witnessed the sudden death of the computer. When he pushed the door open, he found himself in a completely unfamiliar place.
Dim streets, low houses, Japanese-style buildings...
As he walked out of the room holding the console, a girl holding sunflowers suddenly appeared in front of him.
"Please, are you my Master?"
"I am the dynasty! Brahma!"
After experiencing countless gas leaks, Duanmu Ye, who thought that everything was finally settled, decided to go out and relax.
When he opened the door again, he witnessed the changes in the world outside the door, the flashing neon lights, the high-rise buildings with American symbols...
At this moment, a blonde girl holding a teddy bear was looking at him timidly.
"I'm going to, Bi!"
Seeing more and more outer gods appearing at his door, Duanmu Ye posted a message with some helplessness.
"What should I do if my home door becomes a refresh point for the Outer God? Waiting online, urgent!"