Summary: On graduation day, Rei Fukuhara confesses his love to his childhood friend, Miyu Yoshinaga. She smiles through tears-but says nothing. Days later, he learns the truth: Miyu died a year ago. Blinded by grief after his mother's death, Rei never noticed the signs-no one else spoke to Miyu, no one even saw her. She existed only in his world. Now, Rei must uncover the truth behind her mysterious death. It wasn't an accident. And someone is desperate to keep it that way.