Just then, there was a knock at the door.
"I'm back," Qianxun's voice rang out.
Upon hearing this, Su He immediately sprang to the door like a monkey and opened it, "Sis, why have you only just come back?"
Hearing this, Qianxun glanced over at everyone's relaxed expressions and smiled, "I got too engrossed in my book, sorry for making you all worry."
Su Qing immediately said, "It's good that you're okay, but remember to bring your phone next time."
Qianxun nodded.
...
After lunch, since the dining table hadn't been cleared yet, Qianxun was looking at the test papers Su He had done in the morning in her own room.
Su He, with his usual nonchalance, sat by Qianxun's bed and suddenly picked up a delicate button, "Sis, a button from your clothes has come off."
But he felt like he had never seen this button before?