Hi Score Girl: Extra Stage

Episodes 13-15 of Hi Score Girl.

Four years after they first met, Haruo Yaguchi , Akira Oono, and Koharu Hidaka remain the best of friends. Tensions start to build up as Akira's teacher, Gouda Moemi, becomes stricter than ever before, and Hidaka develops feelings for Haruo. Though he may not be the most composed and thoughtful person around, he has within him the one thing that started it all: his unconditional love for video games.

(Source: MAL Rewrite)

Note: Episodes 13-15 had its televised debut starting October 4th, 2019.