Aspiring to become an idol, Ino Sakura moves to Tokyo to live in Mouse House, a dormitory of Rat Productions.

The girls at Mouse House are fired up for a new school semester; after their first day, Hoho tasks them to write a new song for their CD debut and the girls get closer during the process.

Fruit Tart meets Chiko, Nua and Rua of Cream Anmitsu, their producer Riri, and newcomer talent Hemo before their first concert; Hemo helps Ino overcome her nervousness before Fruit Tart's big break.

Ino receives her first fan letter at school from a mystery sender; Hemo joins Fruit Tart as the fifth member and they all do a swimsuit promo shoot.

Fruit Tart comes up with their official autographs to prepare for their CD debut; Hemo and Tone share a fascination with Ino and follow her and Hayu from school.

Fruit Tart goes on a field trip to observe Cream Anmitsu's concert, which inspires her to try and come up with ways to be cute.