Weather Forecast Killer

Lee Saehyun fell into a deeply depressed state after losing his parents when he was still a child.
Coincidentally, he meets a mysterious little boy named Yoonwo, who brings him peace of mind.
For years straight, the little boy would visit Saehyun's house once every week, which helped Saehyun pass time peacefully and comfortably.
However, suddenly after Saehyun began to meet other girls or go on dates, it would always rain, and there was no process in his romantic relationships.
But are these constant unfortunate and coincidental scenarios simply just coincidental? Or is this the work of someone up in the sky?

By Madeleine Scans