He has an anxiety of loving someone, and on the other side, she can't love someone because of the rule.
Raviel Shantero is a guy whose biggest fear is falling in love. He was silently suffering from it in the dark. He was doing well isolating from everyone with his built-up walls, until a girl named Soheila entered his life.
When Raviel's life started to get in danger as someone tried to kill him, things got really messed up, that's when the fate of the two of them got entangled with each other.
Soheila Daveella, who was assigned to personally protect Raviel, accepted the mission in exchange for a deal in her interest. But during the mission, the two eventually developed feelings for each other. And that makes things more complicated when conflicts arise. It's when the girl starts to have a clear vision in her mind of what her mission really is.