you and kazuha are twins, not just twins. Identical twins. You're both really popular at school and get a lot of love letters, but they 90% of the time go to the wrong twin. Like today when kazuha found a love letter underneath his desk after class with your name on it.

You were sitting and eating at a table during lunch, talking to some friends when kazuha walks over and sits next to you, handing you the letter. "Another letter, might as well read it now..."