I’m not a great fan of kDrama n was drawn to this series as I read some reviews here.
I do not understand one part n hope some of u can explain .... last part of ep 7 Sang gu is clearing the room of the dead fighter n a name card dropped out with these words on the back of it ...
Sang-Gu’s older brother!
Make sure they meet!
Who wrote this n how is the related to the dead fighter 🙄🙄🙄🙄

I have asked most of my friends but none can tell me about the significance of this name card .