He and she are brothers and sisters, but they are like strangers.
They care about each other, but no one says anything...
When he was a child, he took the blame for her and she healed him;
In middle school, he hung out on campus and she got excellent grades;
In high school, he was chased by girls and she was admired by boys;
After college, he had his own career, and she moved away...
In fact, the fate between them is so deep but also so shallow.
Only silent efforts, but never received anything in return...