Childhood sweethearts & sister-brother love
Independent and arrogant sister?? Loyal dog and milk dog brother
Yu Yilin chased after He Xinyu because her sister said that she had to become stronger to protect her.
The playful "engagement" he played as a child planted a seed in his heart.
As he grew up, he became his sister's support
"I will be right here waiting for you"
Concept: Two people rely on each other and are also the driving force for progress. The male protagonist slowly makes progress following the footsteps of the female protagonist. When the female protagonist is vulnerable, he has the protection of the male protagonist.