Meet Choi Thana Nyx a class S assassin who works secretly to a mafia boss named Byun Baekho whose the deadliest mafia leader in the country. but despite working in the mafia. she also worked as a licensed doctor.  in the other hand Byun Baekhyun the future heir of his father's mafia organization, He needs to find a girl within two days to be his wife just to stop his father's decision to marry the only daughter of the Jung's Clan.  when Baekhyun offered her a marriage deal 

There are some things Baekhyun and I don't talk about; like our salary; like my parents who don't seem to like him very much; like why he has a full sleeve tattoo that flows to his whole back like a river streaming into an ocean.  But some secrets are bigger than others and not talking about them is only going to strain our marriage.  

RAP MONSTER is known as a young CEO of a big company in South Korea. But that's not all from him. He is also a part of mafia world and one of the top leaders. With that, he has so many enemies. In which, his closet bodyguard sacrificed own life to save his, Rap Monster decided to take care of the only relative of his loyal bodyguard. SOOAH, in her final year of Nursing Care major, received a great pain and sorrow after losing her beloved older brother

Wang Y/n is kind, selfless, loyal, caring, and brave. She has a heart as pure as gold. Unfortunately for her, she and her younger sister were born into a mafia family and she is set to become the next heir. She doesn't want to have anything to do with the mafia and she definitely doesn't want her sister to, so she protects her sister from possible threats until the day they are kidnapped by twelve hot guys that happen to be her parents' biggest rivals. However, she never gives up. She will ei