Takagi and Nishikata from Karakai Jouzu no Takagi-san HD Wallpaper

Two anime characters, a girl and a boy, stand back to back. The girl is wearing a school uniform and has her eyes closed with her mouth open in a laugh. The boy is wearing a dark school uniform and has a frustrated expression with his teeth gritted. The background is a pale green with a honeycomb pattern on the right side.