saturn · @saturnkr
17th Jul 2013 from TwitLonger
Heirs character chart http://twitpic.com/d333rx
(as far as I understand)
Minhyuk's role is Yoon Chan Young(윤찬영), warm and gentle, Eunsang(PSH)'s childhood friend, couple with Lee Bona(Kim Jiwon?).
Kim Woobin's role is Choi Youngdo(최영도), smart but mischievous. Yoo Rahel(Krystal?)'s step brother. (Yonghwa had declined this role.)
Choi Youngdo(KWB) seems in love triangle with main couple. And Yoon Chan Young seems in another triangle with his gf and male lead, because she is his ex-gf.
According to the synopsis, the two leads seem very attractive. Other roles are hardly described.