Dimensional dealer

As soon as he woke up, Josie traveled from the 21st century to Chicago in 1943 and became a poor boy on the streets.
WWII? It was too far away for Josie, who was not yet an adult.
As an orphan, how he can survive in this era is the most important.
Fortunately, he has a plane trading system. In this era, being a master of space and time can be nourished even if you think about it.
However, a few months later, Josie, whose life had just improved a little, looked at Captain America who was singing and dancing with a group of girls on the stage of the war fundraising charity performance in front of him, and fell silent.
It's over, Barbie Q.
This is actually Marvel!