"No, nothing... The keys were completely ordinary. We each got our dorm keys when we moved in at the start of freshman year. Chen Yiqian never lost hers. Ning Xue's, though... her house key was always on that ring... That's it."
"When you graduated, did you return your dorm keys to the dorm supervisor?"
"Mm? Of course. When she went downstairs, she handed in her key. I watched her give it to the dorm supervisor and saw her sign it in. Before leaving the room, she took that key off the ring. I remember it clearly. She had a lot to do before she left and checked everything several times. She even went to the bathroom... She'd left hand soap and a comb in there, then came back to tell me she was giving me the soap and throwing away the comb... I went to the bathroom once, and when I came back, she still wasn't done. Zhang Rou said she was dragging her feet. We'd planned to walk her out together, but Zhang Rou had something to discuss with the counselor. By the time she was done, Zhang Rou was in a hurry and left on her own. So when Chen Yiqian said she'd lost her key, I thought she'd dropped it on the way. She must have tidied everything up before leaving the dorm. We checked it all. Later, when she told me about it, I thought the same thing..."
"Senior, senior... You said Chen Yiqian returned her dorm key to the dorm supervisor?"
"That's right."
"But... but... when we found that ring of keys, it had a dorm key on it... There was a dorm key on the ring. We even tried it and confirmed it. And we were the ones who returned the dorm key to