matching smartphone wallpapers for couples; paired wallpapers
Refers to a set of two smartphone wallpapers designed to be used by two people, typically romantic partners, so that the images complement each other when the phones are placed side by side.
I'm using matching wallpapers with my boyfriend.
These paired wallpapers are really cute, aren't they?
Compound of ペア (pair) and 壁紙 (wallpaper, especially smartphone wallpaper). A modern term that emerged with smartphone culture.