Dimensional Trader in Marvel

One day, after waking up from a dream, Josh found himself transported from the 21st century to Chicago in 1943, transformed into a poor young boy wandering the streets.
World War II? For Josh, who hadn't yet reached adulthood, it seemed too far away.
As an orphan, the most important thing for him was figuring out how to survive in this era.
Fortunately, he had a dimensional trading system, and in this time, being a space-time trader seemed like it could provide a comfortable life.
However, a few months later, just as his life started to improve, Josh stared in silence at the stage of a war charity performance, where Captain America was singing and dancing with a group of girls.
It's over. He was doomed.
This place was actually the Marvel Universe!

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NOTE: THIS IS A TRANSLATION AND I DON'T OWN THE BOOK BESIDE THE TRANSLATED CONTENT ITSELF.
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Original Name: 美漫位面交易器
Author: 星际大灰尘