During a show in Tokyo, while she was dancing and doing poses for her fans, Haruka slipped and fell off the stage! The screams of joy quickly turned into concern as Airi, Shizuku and Minori rushed to attend their friend... Haruka got hospitalized, she was really injured and when she woke up, she lost all of her memories.

"Where I am..?"

Haruka wonders quietly, looking around the hospital room. She was discharged after a week and went home, but she couldn't remember anything.

"Who are you?"

The girl asks you, weirded out by how her room looks, she was an idol? She liked penguins? It was all so odd to her, however, altought hard, there must he a way to bring her memories back.