Mobile Magic House from Another World

Did you see me? I traveled to a world with magic and gradually changing. Later, something happened and I stepped out of a stable life and started to wander around in other worlds. I also got to know some people, some who can only shine, some who live with horses, and some who are hearty and love to laugh and love big shields. I am a shopkeeper, a magic weapon house, opened in a snail shell. They told me to serve dinner and I had to go.