Elite bodyguard Tatsunokuke Kitazawa, protects lawyer Rika Kishimura while trying to solve his police officer father's murder case that occurred during a robbery. They begin living together as Kitazawa looks into who killed his dad.

Tstsunosuke Kitazawa (Hikaru Iwamoto) works as an elite bodyguard for a bodyguard protection company. He is the ace at the company with excellent athletic abilities and high customer satisfaction rate. He has strong self-control and he usually stays two or three steps ahead of a situation. When he takes action, he is usually calm and cool with his judgment. On the other hand, he really likes sweets. Tstsunosuke Kitazawa is currently working on finding out who killed his father. His father was a police officer, but he was stabbed to death in a robbery. Tstsunosuke Kitazawa became a police officer to find his father's killer, but Tstsunosuke Kitazawa found it difficult to work there while working on his father's case. He then became a bodyguard to spend more time on his father's case. Tstsunosuke Kitazawa gets assigned a new client by his company. The client is Rika Kishimura (Mai Shiraishi), who works as a lawyer. The director at her law firm worries about her safety due to a case she is working on and has hired Tstsunosuke Kitazawa to protect her 24 hours a day. Rika Kishimura and Tstsunosuke Kitazawa begin to live together.—AsianWiki