The drama that ive watched is Chicago Typewriter♡
Im not good at describing something but I'll give a try.
This drama is another drama about reminiscences. For the first 3 to 4 episodes you will be really confuse with Kyungpyo's character (I wont spoil it because his character is important in this drama haha) but apparently he is yoo ah in's ghostwriter. In their past life, Yoo Ah-in, Im Soo-jung and Go Kyung-pyo are best friends who fight for their country when Korea was being ruled by Japan. So in the present, kyungpyo wanted to know how is the ending of their life (like how did he died and who killed him) and yoo ah in & im soojung are curious on what connection do they have in the past.
This drama is one of the best drama that ive ever watch and I'd give 10/10 for it. I like it so much but the rating for this was too low... And only few ppl talked about this drama. The ending for this drama was really sad, and you can feel the pain of it. Overall i think this drama is about friendship and also how patriotic they were in order to fight for their country.
I hope you all will watch this drama ^^; and its hard to find ppl who have watched this drama... or it is just me hahahaha