Time slipped quietly by as Su Er followed Hermione.
On Thursday evening, after watching Hermione return safely to her dormitory, Su Er went back to the Room of Requirement as a matter of course, sitting at the desk and writing and sketching on parchment as he thought.
Hermione had used the Time-Turner at least five times that day, twice to get to classes and another three times to catch up on homework...
Hmm, I can't rule out the possibility that she used the Time-Turner in the common room, either...
I still need a little spy. Su Er turned his gaze toward Crookshanks, who was sleeping on a shelf...
"Crookshanks, the organization has a mission for you." Su Er looked solemnly at the big cat he had plucked up and set on the desk.
"Meow..." Crookshanks flicked his large tail and looked at Su Er with clear, bright eyes, utterly bewildered.
"See this?" Su Er took out the gold pocket watch hidden against his chest and waved it in front of Crookshanks.
"Meow..." Crookshanks answered, though there was no telling whether he understood.
"This concerns your owner, Crookshanks. You'd better take it seriously," Su Er said. "Tomorrow morning, once everyone in Gryffindor has gone to class, I'll put you in the dormitory. Then, whenever Hermione is in the dormitory, you must keep an eye on her for me. If you see her take out this pocket watch..."
"Meow once for every time she uses it. Understood?"
Crookshanks tilted his head, apparently thinking, and only nodded after a while.
Afraid he had not understood, Su Er took out the Time-Turner several more times, then asked Crookshanks how many times he had taken it out in total.
Fortunately, Crookshanks was a very clever big cat. After thinking for a while longer, he gave