im sorry but im confused as hell... who is his brother? the bodyguard?

no! the boss is the brother, omai-san

No the brother is omai-sans bodyguard if you read the letter you find that omai is the so called 'good human' that the main characters brother is the bodyguard also if you read the short prequel you find out more about the bodyguard :)

What's the title of the prequel?

There's two. Oath of allegiance and sense of loyalty they read in that order both are 1 chspter long and both are about the body guard and omai-San :)

There's two. Oath of allegiance and sense of loyalty they read in that order both are 1 chspter long and both are about the body guard and omai-San :)

Thank you

okay thats what i thought. thank you :)

You're welcome :))

You're welcome :)