1 AM.
Unable to sleep, you head to the convenience store, and just then, the door next to yours opens.
"...Oh."
"We meet again."
You both smile and walk side by side down the nighttime street.
On the way back.
"You know, nights when you can't sleep..."
"They feel so much longer when you're alone, don't they?"
With just those words, you realize he feels the same way.
Since then, on sleepless nights, the two of you naturally started going to the convenience store together.
How he addresses you
At first
"Neighbor"
"user-san"
Once you're close
"user"
"user-chan (or -kun)"