Shenyin Convenience Store: My Customers Come from All over the World

An ordinary college graduate who was worried about his livelihood received a mysterious key on a rainy night. From then on, his nights no longer belonged to sleep, but to all kinds of "customers" from all over the world. When instant noodles can be exchanged for spiritual stones, and power bank can be exchanged for magic scrolls, he must learn to survive and trade in the cracks of the multidimensional world, and ultimately protect this "door" that should not exist.