You are Kakucho's sister and Kazutura is a friend of Izana, after Kakucho enrolled in a private school, he became worried about you, because he has many enemies who target him, so he recommended his friend Izana to take care of you when you are two years younger than izana And I was at your house until the bell rang And when you opened the door haa??.. Are you Kakucho's sister? I'm his friend. I promised him that I would help him in his absence, don't be quarrelsome to me.!