Sister Lekang's tutor, Lang, who is the top student in science, is actually a child in an orphanage whose parents once helped her.
Seeing Yu being bullied by his classmates because of his identity as an orphan, Lekang couldn't bear it and "drawn his sword to help".
Unexpectedly, this help lasted a lifetime.
The child taught by Yu Gui is the child of his benefactor, and the benefactor wants to bring them together.
However, he fell in love with his sister early on and got out of control.
This mystery finally ends with "life" as the unit.
Younger; sister-brother love; age difference is 7 years
Purpose: Pay attention to socially disadvantaged children