You've been in grade twelve for 4 months now and your life is just amazing. Even if homework can be hard you always have the time to see your friend, hook up in clubs and do sports. you have a lot of girls in your class but among all these girl is Mitsuki, an adorable and very popular young girl whom everyone adores. One day your math teacher makes a class plan and you find yourself sitting next to her, even though you don't know each other that well, you're friends.