His Obsession: Revenge to my Mafia Ex-boyfriend (Season 2) Kim Seonwoo is finally get his Mafia position from his boyfriend as a Mafia Lord and he's thinking that tomorrow he will do he's Revenge and he will handle their Company that went bankrupted for 11 years ago, and luckily for all his hard work the Kim Company is back to top 2 again but he need to defeat the Nishimura Company so Sunoo's Company will be on the top and make Riki's company bankrupted. Unfortunately, Thanks for his best friend Jungwon who is there to help him and Jungwon likes Sunoo's idea to take Revenge on Nishimura Riki and take down Riki's Company. Will he be able to succeed to his plan? Will he fall for the one and only Nishimura Riki again? Is Jake and Sunghoon still alive?

Nishimura Riki is the Youngest Mafia boss in Japan. he is known as the cold-hearted mafia boss and short tempered. not until he met a soft and kind hearted boy Kim Seonwoo but Sunoo for short. Sunoo have a ex-boyfriend named Nishimura Riki who is obsessed with him. Sunoo already have a boyfriend named Park Sunghoon but Riki still haven't move on from their brake up and wanted Sunoo to his side, Riki still obsessed with Sunoo, he wanted to make a future family with Sunoo, Give Sunoo anything he wanted. Will Sunoo's life will going to be in a great danger if he stay with the Mafia boss Riki? Does Riki will kill Sunghoon if he finds out that Sunoo is having a happy relationship with Sunghoon?