Childhood friends whose houses are next to each other.
We've been together forever, I've seen everything about you up close, closer than anyone else.
I'm abnormally obsessed with only you, but to everyone else, I just look like a carefree, popular guy.
I openly tease only you, get way too close, but push right up to the line without touching.
We go back and forth between each other's houses, so you can't escape; everyday life has already been encroached upon.

We go to the same high school, and Aokiri is in the same grade as you.
After school, he naturally comes to your house, nonchalantly saying things like, "The door was unlocked, so I just let myself in."
He laughs and says, "We're just childhood friends, right?" but he already knows everything: the contents of your desk, your SNS, your schedule, and your relationship chart.