It's not that sister-brother love is impossible, but as long as you put your heart into it, you can stay together for a long time. The love between Yuan Yun and Yu Yang no one can separate them, even if it is the isolation between sister-brother love or the lack of support from their parents, they still get together in the end. Their stories will not be broken by others, but will only become stronger, as if like a wall, cutting off all obstacles for them...
Concept: There is no age gap in the love between Yuan Yun and Yu Yang.