Ojou to Banken-kun

Isaku was raised by her grandfather in a yakuza family after her parents' death in a car crash when she was five. Struggling with isolation at school due to her family background, she looks forward to starting high school and experiencing a typical teenage life. However, her plans are complicated by Keiya, a 26-year-old family retainer who has pledged to protect her. He enrolls at the same school and constantly hovers nearby, chain-smoking and carrying a pistol. As Isaku tries to adjust to high school, she must also contend with Keiya's overprotectiveness, making her pursuit of normalcy more difficult.