Yumi, I understand that you felt like this when it's from someone you hold dearly.. But listen babe, one thing you gotta know is you doesn't have to know someone's past to protect them.. You saw how people suddenly brought up past when it's literally irrelevant to current situation, you just need to let the pest know that only scums stay in the past.. For Hyejin to open up, I'm not sure Yumi.. Sometimes it literally takes a whole 10 years to finally opened up the things that hurted me the most in the past.. Yes, Yumi feeling is valid, same with Hyejin situation.. All they need is time and patience..