Kasuga Kaneko was a perfect student—nine years as class president, perfect attendance, top grades. At least that was how the story went.

But in high school, she became cold, mute, and absent, hiding her left eye behind an eyepatch.

Until one misfortune pulled Yamato Tatsuya, her classmate, to discovers her terrible secret.

Kasuga killed a cat once for power. But unfortunately, it caused her harm than good.

And that past had erased not only her grace, but also her will to believe everything she saw.