5-3 homeroom teachers. She is as scatterbrain, and is as innocent like a child. She is voluptuous. Her room is filled up in anime goods and manga such as "Gambaman" and "Love Rin", etc. Haruka is a descendant of Rumino Ninja that guards the Ruminotait. Kai and she trained themselves together. She helps Shinsengumi as Kunoichi. She calls chi "Oni-chan" and loves him.
Yuki, White Album's main heroine, is an idol singer rising in popularity, and is affiliated with the Ogata Productions. She has a warm and kindhearted personality, and is in her second year attending university with Touya, with whom she attended high school together. (Source: Wikipedia)
Touya's childhood friend. She's athletic but a bit of a strange girl. She lost her oldest brother in a traffic accident and now uses Touya as a replacement for him. She probably has a crush on Touya but convinces herself that that's not true.
The third up and coming idol.
Toya's childhood friend. Clever and a bit secluded girl. Good scenario writer and designer. Probably has crush on Toya but knows that she doesn't have any chances so she hides her feelings from him