Lonely Castle in the Mirror

Kokoro Anzai, a first-year at Yukishina Junior High School, uncomfortably stays at home due to bullying. She attends a child development support class, and has not returned to school since. One day, she finds the magical portal within the mirror at her room. While inspecting, she is dragged into the mirror and finds herself in front of a castle on the island surrounded by water. There, she meets a girl with a wolf mask. The self-proclaimed Wolf Queen introduces her to six others: Subaru Nagahisa, Akiko Inoue, Rion Mizumori, Earth Masamune, Fūka Hasegawa, and Haruka Ureshino. Addressing them as Little Red Riding Hoods, the Wolf Queen instructs them to find a key hidden in the castle, which will lead them to a room where one can make a wish, before the deadline of March 30 of the following year. If anyone makes a correct wish, it will be granted and all children will lose their memories of the castle. She also tells the children to leave before 5pm. Any child who stays at the castle on the evening will be eaten by a wolf.