There is such a situation:
The two went to the same school for 12 years.
In elementary school, one person was in the classroom at the stairwell at one end, and the other was in the classroom at the other end of the stairway on the same floor;
In junior high school, one person was upstairs and the other was downstairs in the same building;
When I was a freshman in high school, one person was on the first floor of this building and the other was on the first floor of that building;
After the liberal arts classes were divided into classes in the second year of high school, one person was on the third floor of this building and the other was on the third floor of that building;
After entering the third year of high school, one person was in a corner of the first floor and the other was in another corner of the fourth floor;
We have known each other for 12 years at the same school, but we have never been classmates.
In the first nine years, I was ignorant;
Then, it was a deep love.