BG: Personal Bodyguard

Overview
Akira Shimazaki (Takuya Kimura) lives with his middle school student son. He used to work as a bodyguard, but, due to an incident, he now works as a security guard at a construction site. The private security company where he works establishes a new bodyguard division. Hiding his past as a bodyguard, Akira Shimazaki begins work as a novice bodyguard.
BG: Personal Bodyguard Collection
Season 1 (9 Episodes)
A retired bodyguard pretends to be a novice when his humble security company decides to implement a new bodyguard division.
Season 2 (7 Episodes)
KICKS, the private security company, where Akira Shimazaki works is sold to a large company. New leadership at KICKS is laser-focused on making a profit, leaving Shimazaki unhappy. To stay true to his belief of protecting the weak, he quits his job at the private security company. Akira Shimazaki begins to work for himself as a private bodyguard.
Recommendation & Similar
The Family (2007)
The Mandalorian (2019)
Hawkeye (2021)
Moon Knight (2022)
Over the Garden Wall (2014)
One-Punch Man (2015)
Brooklyn Nine-Nine (2013)
Naruto Shippūden (2007)
The Witcher (2019)
Squid Game (2021)
The Walking Dead (2010)
Sex Education (2019)
Nisekoi (2014)
The Boys (2019)
The Rising of the Shield Hero (2019)
Attack on Titan (2013)
Fate/stay night [Unlimited Blade Works] (2014)
Banana Fish (2018)
Game of Thrones (2011)
Peaky Blinders (2013)