Nianyu Island

The heroine accidentally traveled to a parallel time and space while sleeping during night study. She met the hero who transferred to another school and became her roommate. She experienced a lot of youth in the throb of adolescence. But one day the girl woke up and found that it was just a dream. She looked around for the whereabouts of the hero. She thought it was really a dream and wanted to give up, but fortunately she met again...