Yohko Mono is a regular girl making her way through high school--until she learns that she is the 108th successor to a line of warriors charged with defending the earth against demons. Eventually she must fight her ultimate battle against the demon who started it all.

Based on a manga "Noroiya Shimai" written by Hirarin and serialized in Monthly Comic Ryuu. It is a story about a pair of sisters who work as "noroiya" (cursers) using magic in a fantasy world. One day a big tree suddenly appears in a forest, and tall buildings that look like they are from our world can be seen entangled in it. The two sisters go there to investigate and get ported to our world. They then encounter two children who are startled by the sisters' sudden appearance and rush back home but at home they see their parents turned into monsters...

Kishimoto Kasumi, a 15-year-old girl, was supposed to live at her auntie's house in order to go to high school since April. However, when she moved to the house she was surprised with the fact that there were already four new male students living in the same house. To make the matter worse, that day while she was taking a bath, Takasugi Yusaku, one of those boys, came into the bath and saw her naked. This is how Kasumi's troublesome high school days started. (Source: AniDB)

The unaired 26th episode bundled with the ninth Blu-ray and DVD volume of The iDOLM@STER Cinderella Girls.