Besides the central love triangle on 'Heirs', the supporting cast members give us a breath of fresh air with their lovable charms as shown in these behind-the-scenes photos.

SEE ALSO: The cast of 'Heirs' are all smiles in BTS photos

f(x)'s Krystal, CNBLUE's Minhyuk, ZE:A's Hyungsik, Kim Sung Ryung, and Kim Mi Kyung gave us more reasons to love them with their cute V-signs and don't-mess-with-me smiles on set.

A rep commented, "The five 'Heirs-ly' (combination of 'Heirs' and 'lovely') actors have undeniably unique charms while saying their lines with attitude and naturally becoming one with their characters... They exude a strong aura on set, so please continue to anticipate their presence as top actors."

Catch 'Heirs' every Wednesday and Thursday!