Vanishing Time: A Boy Who Returned 2016 (South Korea), also known as Hidden Time, Garyeojin Shigan is South Korea drama premiere on Nov 16, 2016
Soo Rin, a 6th grade student, moved due to her father's job. In her new school, people label her as a weirdo and avoid her after reading her blog. However, Sung Min, from the next class, befriends her and they fell in love. One day, Soo Rin, Sung Min, and Sung Min's friends Tae Shik and Jae Wook go to the mountains. There they find a cave under a tree which lead them to mysterious egg. Soo Rin then notices that the boys have disappeared and the police start looking for them. A few days later, Sung Min appears again but as an adult.