Welcome to Hokkaido Ultra Dimension Academy.

The game is a very interactive visual novel about a student that goes to an academy full of extraordinary creatures. While you get to read about a story of a young woman finding themselves in an unusual place, it also features the lives and developments of three other students: the blue skinned Azura Bell, the four armed Seiko Watanabe, and the oddly normal Yasuda Nana. During the story, you will occasionally get “Free Time”, which allows you to roam around the school and get to know the environment of the supernatural world. Ultimately, the decisions that you make in the game matter, as the way you play will change your ending in various ways.

[From Itch.io]