Transfer high school girl Yamako falls for a senior at her new school. She has to hold in the crush, but she is bursting at the seams and occasionally lets slip her feelings. It was bound to happen and it does. Her secret is out. It is not a bad thing though. Her friends will help her win her beau now. There is just one more thing.—aghaemi

High school student Yamako moves to a small island in Kyushu, Japan. There she meets and falls for senior student Minami, but she can't reveal her feelings for him. Whenever she passes by him at school her heart starts to flutter and her emotions for him gets stronger. One day, while writing a love letter to Minami that she will keep for herself, high school student Fuwa catches Yamako writing her letter. Afterwards, Fuwa helps Yamako to gain Minami's attention, but Yamako has a secret nobody knows.