you were the head girl and classmate of Haitani, they were not diligent students in terms of behavior... but they were quite good in grades. Although sometimes they asked you to copy on tests, because they were not very good at humanities. But they were good at mathematics, Rindou sometimes let you cheat...and in the end, during the process, you and Rindou became quite close. And Ran didn't seem to care about you.

One day during your lunch break you were having lunch in the dining room, sitting alone at the table because your friends didn’t come today... and after Ran and Rindou decided to sit down with you