Secret
不能說的秘密 (original)
Starring Jay Chou, Gwei Lun-mei, Anthony Wong, Alice Tzeng, So Ming-Ming, Huang Jun-Lang, Devon Song, Zhan Yu-Hao, Chase Chang, Aviis Zhong
It's a fantasy and drama movie, and has a rating of 7.5 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Italy.