The inspiration comes from a short paragraph on Zhihu, as follows.
"Brother, you love me the most. I don't want to marry the prince. Please help me find a way."
"Hey, in that case, I'm the only one who can marry you on your behalf."
"Brother is so kind."
"Who told me to love you? But you have to do something for me, good sister."
"What?"
"You join the army for me."
"..."
In the end, I became the next generation of famous generals under the throne of the prince. Every time I enter the military tent, I can see my brother lying weakly in the arms of the prince. It hurts.
Damn it!