Bushin Gikyoku

In Tokyo, 2002, a young Japanese boy Tatsuaki dares to learn something novel to the most of Japanese: Beijing Opera. One day, he receives a Kouu mask from his master. He tries it on and is instantly transported back to Beijing, circa 1924! So begins Tatsuaki's adventures in treacherous Beijing' grande world of opera.

(Source: Fifay.net, edited)