Kyougaku ni Natta Moto Danshikou ni Choroi Seikaku no Onna no Ko ga Tatta Hitori dake Nyuugaku Shitara... The Motion Anime

The action of the hentai takes place in a former all-boys high school with an escalator system. Starting this year, the academy began to practice coeducation and the first girls were supposed to join the boys' ranks. However, the boys' dreams were destined to be shattered, because only one girl enrolled this year. However, she was incredibly beautiful and sexy, so the guys quickly forgot about their disappointment.