It's like in 95+ something, it's like when Min Seong needed to meet the lady (don't remember her name) who said he was cursed or something, it's before he bring Kangjin to meet his mother who have dementia. Kang Jin explained that the restaurant is place for ghost to eat yada yada and the lady is like an old ghost from ancient time so it won't like overwhelm Min Seong on why the lady speak and act like that

When did Min-seong find out about Kang-Jin and the underworld?? What chapter was that omg I don’t remember