Zuori Qing Kong
English title: Crystal Sky of Yesterday
Japanese title: 昨日青空
Type: Movie
Episodes: 1
Source: Manga
Genres: Drama, Romance, Slice of Life
Studios: Nice Boat Animation, Guton Animation Studio
Producers: Beijing Enlight Pictures, Horgos Coloroom Pictures Co., Ltd.
Duration: 1 hr 22 min
Rating: PG-13 - Teens 13 or older

In the late 90's, in China, Tu Xiaoyi, an high school student, takes no interest in marks and prefers to play video games with his friend nicknamed "Peanut." One day, he was chosen by his teacher to become the class representative with Yao Zhetian, a very cute girl. He will experience his first love and disappointments.