Shouko immediately called Ono once she read the message. Since Ono didn't tell her the details, she had to inquire about it directly. It took her three rings before the call got connected.
"Shouko?" Ono's voice came from the end of the line.
"Uhuh, are you busy?"
Shouko glanced at Kyoya who was looking at her from the bed. She smiled and silently made a gesture showing he should sleep first. After that, she walked out into the balcony.
"No. I'm quite free this weekend. I was the one who thought you're busy with the harvest festival so I dared not to call you," Ono sighed.
Shouko had mentioned to Ono that she would go to the suburb for the harvest festival celebration. Fearing that her call would only disturb her sister, Ono chose to just send Shouko a message.
I hope my understanding of the flight time was right *sigh