C715 Coming

"Yes, there is a unique rule." Liu Yan's eyes lit up as she whispered.

"What's the pattern?" I asked.

"Every time he comes here it's raining." I asked.

"Is it raining every time he comes?" I asked.

"Yes." Liu Yan nodded.

I blinked my eyes and thought back carefully. It seemed like it had rained a few times this month