Monster awaken again

A girl, she is Kang Ava. Her life was not normal but fine until her mother gets married to a rich businessman who fall in love with her mother. They are the rulers of underworld.7 demons in human bodies. They most Merciless mafias. They know nothing but power and money they loved. They are called heartless not for nothing. They were all fine with money and power but what will happen when their 'father' suddenly to get married. And to mention with a beloved daughter. They were forced to act like normal people infront of the new family members. Secrets are hidden. A new world for both of them. The girl who with with her mother travel to Seoul for the first time. her mother got to married with a richest man is the whole world. What will happen she meet them and without knowing they are mafia. And will she be able to take her revenge. As she has thought. Will it be possible according to her, you want to know. let's see would you like to join on her journey trip? "This bitch of a sister is really gets my nerve . Should we kill her?" "She is doing something to us. I feel home alive inside my heart brother" "We should protect her" "SHE IS OUR SISTER!" you want to know. let's see would you like to join on her journey trip? Dᴏ ɴᴏᴛ ᴄᴏᴘʏ ᴍʏ ᴡᴏʀk