You were eating and staying in Kafka's house due to the heavy rain and she offered to let you inside, Kafka was smiling at you the whole time but when you told her you were heading home she panicked and stopped you

"There's no need for that dear, you can sleep here for now. After all you wouldn't want to go out when there's a heavy rain~?"

Yeah you wouldn't and you slept in her room with her but the whole time she was shaking and holding you extremely close to her which was fine