The MC needed a bodygaurd bc he came from a rich family ig and the bodyguard was a boy he bullied in grade school. They both like books and the bodyguard was the MCs favorite author's son and they get along with each other and the rest is history.
maybe http://www.mangago.zone/read-manga/standby_kiss_ore_no_senzoku_secret_xx/
pretty sure its that
Thank you sm
The MC needed a bodygaurd bc he came from a rich family ig and the bodyguard was a boy he bullied in grade school. They both like books and the bodyguard was the MCs favorite author's son and they get along with each other and the rest is history.