Review Detail of Rysangel in Butterflies and Pins

Like the story so much. Feels like I'm watching K-drama in the form of a novel. I like t=it better than watching K-drama since I could read it in my free time and it doesn't take me that much of a time. the pacing and plot were fine, like how the author used a special day of spirit to somehow explain the time travel and not just a random system popping out of nowhere. In conclusion, a wholesome and nice story to read ^_^.