Dojo, girls' sleeping quarters Wednesday afternoon…
The students were asked to take a rest and nap after lunch so they have the energy for the night performances. A famous kabuki troupe would be having a show that day.
In reality, the kabuki didn't have to start at night. They just made it so to give all the servants a chance to rest after all the commotion the night before - but of course, the students didn't have to know about that.
They just arranged for a night event for them.
Miharu, Rin, and Midori woke up from their nap finding Okada Koharu's futon empty. The rolled-up bed was not even made up, and was still warm, indicating that the girl had left not too long ago.