Demi-chan wa Kataritai: Demi-chan no Natsuyasumi
English title: Interviews With Monster Girls: The Demi-chans' Summer Break
Japanese title: 亜人ちゃんは語りたい 亜人ちゃんの夏休み
Type: ONA
Episodes: 1
Source: Manga
Genres: Comedy, Fantasy
Studios: A-1 Pictures
Duration: 23 min
Rating: PG-13 - Teens 13 or older

During summer break, Tetsuo asks Sakie to join him on patrol duty for the local summer festival, which both the demis and Himari and her friends go to. As each group decides to check out a nearby shrine, they get spooked by some strange occurrences, which turn out to be each other. As the next term begins, Tetsuo converses with an invisible woman named Matsuri.

(Source: Crunchyroll)