Sawatdee Krab -- Adventure in Thailand

The story

After his parents vanish during an archaeological expedition, Liu Yu is recruited by Professor Wei to enter an AI-generated world and assume the identity of a long-dead Sukhothai prince in order to uncover clues to a legendary treasure lost a thousand years ago. But within the simulation, a terminally ill spy posing as Princess Zhaoyang is also searching for the treasure, and the two cautiously circle each other while hiding their true motives.