The Solitary Castle in the Mirror

The Solitary Castle in the Mirror summary: Despite being a first-year middle school student, Kokoro's severe social anxiety has caused her to drop out of school and isolate herself in her home. She spends her days consumed with guilt over the disappointment she sees in her parent's eyes. Then, one day, a glowing mirror in her room transports her to a fairy tale-like castle where she meets six other children her age. She learns from a little girl in a wolf mask called "Ookami-sama" that the key to a wish is hidden within the castle. The only rule is they must leave before 5 PM or risk being eaten by the Wolf.