When 12-year-old Gu Muyun meets 11-year-old Yu Xinle, youth has a bright sadness. When he was 13 years old, the Gu family encountered great changes, and Gu Muyun's personality changed drastically. When they were 14 years old, their first year of intimacy. When she was 15 years old, her lover Yu Xingle no longer wanted her. When they were 16 years old, they met again. When he was 17 years old, Gu Muyun became a joke. When I was 18 years old, it was too late to say I love you. At the age of 19, their seventh year, they were ultimately no match for the seven-year itch...
Motto: Friends are better than relatives, missing them is a mistake