Silk Road Shounen Yuuto

When a boy Yuto visits Qinghai in China, he is involved in the battle between time-travelers, and he is sent to the Silk Road in the past. They are looking for a mysterious treasure, the statue of Yuki Daruma Taishi, which is said to make miracles. Seeing historical events and encountering historical persons, such as Yang Guifei and Xuanzang, he will learn many thinks. Whether will he be able to go back to today?