Hasegawa Kouta, 17 years old, is a second-year high school student.

His days are unremarkable and average when Kouta meets Mizuno Yuu, Yoshino Shunsuke, Nishimiya Ryo, and Minamoto Seiichiro, who are fellow students attending Hijirikawa High School.

In an instant, Kouta's average life begins to be awash with sparkling light.

A tale of a sparkling youth and his encounter with the Sanrio Boys.

Our story begins.