lofi girl (youtube)
A YouTube channel that broadcasts lo-fi music (low fidelity, meaning audio with audible imperfections but suited for relaxation) for late nights and studying. Often refers to the video thumbnail showing a girl studying at a desk.
The channel originally featured a scene reference of Tsukishima Shizuku from Mimi wo Sumaseba studying, and was replaced by a similar original character in a very similar scene.