Our Yakuza President

Tengoku Highschool is infamous for it's useless teachers and disfunctional school system.Yet it is famous for it's low tuition fee and it still being an educational facility.
The reason for this school's bad reputation is due to the three students known as the deadly trio.

Kenzou Matsuo, Raiden Harada and Subaru Maeda.

This three people rule the school and the teacher's are too scared to stop them. However, a certain 'yakuza-in-hiding' female is about to wreck the school's messed up system.

Due to the new rule of the student council president being chosen in lots, Chiyo Asano is about to have the greatest change in her supposed to be new life. As well as the deathly trio having to face a new kind of individual they have never seen before.

Now the question is,

Is Chiyo a friend or a foe of this three men?