I opened a shop on the Astral Train

Yuri traveled to the Star Railway World and obtained the “Mall of All Worlds” system. Through the system, Yuri can sell items from all over the world and invite guests from other worlds to come to the Star Rail. His first encounter comes with a space traveler by the name of Kevin, and soon...many new experiences begin.. Every time the turnover reaches a certain amount, Yuri will receive a reward from the system. What journey will be uncovered...?