Bandai Namco has released the opening video for Little Witch Academia: Chamber of Time. The opening properly captures the art style that replicates that anime, and also shows off some gameplay tidbits. Little Witch Academia: Chamber of Time will release in North Amercia and Europe digitally only.
Here is the opening video:

 
We have some additional Chamber of Time details, including the story:
After finishing their final exam, the students of the Luna Nova Academy are about to leave for summer vacation. Akko discovers a secret room in the library that leads to the Chamber of Horologium, hidden in the basement of the school. Within the chamber is a clock that uses a forbidden magic to manipulate time; it?s one of the seven wonders of the Luna Nova Academy. Akko and her friends end up trapped in a time loop, re-living the same day over and over and over and over? Will they be able to escape this time paradox and solve all of the mysteries of the Academy" And more background information about both the anime and game:

Having been inspired by a famous witch named Shiny Chariot, an ordinary girl named Atsuko (Akko) Kagari enrolls at Luna Nova Magical Academy, a prestigious school for young girls training to become witches. Before starting summer vacation, Akko and her new classmates find out about an inexplicable phenomenon at Luna Nova caused by the Seven Wonders, which has been passed down for several centuries. Now it?s up to Akko as she takes on the adventure...