Lady in Mystery achievements

You've answered more than 3 times with the word that didn't exist in that time period.

Kang Yurin came in to your room.

You've cleared all the common episodes and now reached the the point where you can choose your own episode.

Seoyeon gave you a Seonchu as a gift.

You've asked the pale worker on episode 4 why he can't look at the blood.

Arrest the suspect on episode 2.