JYJ3 note: Park Eun-tae is a longtime friend of Junsu.
He had shared the role of Mozart with Junsu in 2011; and also had acted as Lucheni in ‘Elisabeth'(2012) with Junsu.
[TRANS]
The common message sent in the spare time during intermission after both the 1st curtains, of Frankenstein’s Park Eun-tae and Dracula’s Kim Junsu, ends..
By the way, if there is a musical called Dracula vs Frankenstein made.. what I said, it is how I imagine it to be..
[Translations]
Hyung
Are you busy?
Secondly
Are you staying healthy and doing well?
You’re cuteㅋ
ㅋㅋ l am in the middle of preparing for a performance~~~^^
You are busy preparing for your two performances ㅋㅋ
How about we talk to each other here after the performance ends?
Hwa-ting!
OK OK
ㅋㅋ Hwaiting ~~^^
Dracula 1st curtain endㅋ
Did Frankenstein end also for hyung?
ㅋㅋ I’m starting this curtain~*^
Dracula vs Frankenstein
Let’s go up against each other once
ㅋ
ㅋㅋ Hwasting, Junsu-yah
ㅋㅋ I’ll kill you all
I couldn’t ㅋㅋ
I am the coolest
Heol
ㅋㅋ I’ll teach you a little bit
ㅋㅋ
Park Eun-tae..is the coolest..
This is..a ludicrous remark..
ㅋㅋ
ㅋㅋ I’ll be going and coming back~~^^
Bye-bye~I’ve killed too much, in the play, a bit of people~
I am very strong ㅋㅋ
I’ll be going and coming back
I’ve the control ability of wind and fog
I should show you..ㅋ
Bye
Source: @1215thexiahtic
Translated by: rilanna of JYJ3
Shared by: JYJ3
JYJ3 
He seems very happy and playful these days. Thanks for the translations!