Main story: "I stumbled out, trembling, but I knew they were still trapped in the sealed darkness," said the Black Knight. "This is a play. No smile can conceal the tears; only broken wounds remain behind." I want to save them, the people called the Infected.
Extra: The Black Knight Princess, having completed her mission, is enjoying her happy everyday life.
Question: "What does it mean to do something meaningful?"
Answer: "To live well."
Question: "Then how can you live well?"
Answer: "By doing something meaningful."
P.S. It'd be even better if you added it to your library!