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Kinamara created a topic of Missing Love

I’m too lazy to re-read the beginning of the chapters. I read this a while back and got back into the latest chapters and have completely vividly forgotten what happened in the beginning of the manhwa. Can anyone explain to me why in chapter 48-49 why Wooyeon is begging for Geom and what happened in the past that made Wooyeon beg for Geom?