Volume 9 of Sasaki to Miyano (平野と鍵浦) a manga series written and illustrated by Shō Harusono. It began in 2016 on the Internet website Pixiv.
This special edition includes a DVD that belongs to region 2 NTSC, so it may not be compatible with all European players.
This manga is the story of 2 students who share a hobby: they read boys' love genre manga. For this reason, they will start a very special relationship.