Sensei Kunshu

Ayuha Samaru, Ayu for her friends, is a girl who believes to have no luck in love since she has always been rejected.
One day, when she doesn't have enough money to pay the bill on a restaurant, a handsome boy comes to her rescue. Ayu feels really excited about this incident but the day after it, she finds out that handsome boy is actually her new math teacher, Hiromitsu, and he is treating her bad…?
What's going to happen between these two? Ayu's real lessons will start!