'PM 10:21' is a 'Yoo Ji-min's text message' in White Day: A Labyrinth Named School (Remake).
It is exclusive to the PC/PS4 remake version.
You can see this message when you play the 'Yoo Ji-min' route.
Location[]
It is found in the Messages Menu. (Mobile Phone - Gameplay element feature)
Transcript[]
2017[]
It's your birthday soon.
I got you a great gift.
You can find out what it is soon.
I want to see you right now.
공주마마 생일이 얼마 남지 않았군~
엄마가 멋진 선물 준비했어~
곧 만나~
빨리 시간이 갔음 좋겠구나~
Gallery[]