This is a love story between an HIV-positive schoolgirl and a famous songwriter.
Keigo is a successful songwriter, but his life had been empty since the death of his girlfriend. One night after a concert, Keigo encounters a young girl named Masaki, a typical high school student struggling to find meaning in her life.
Being a big fan of Keigo, Masaki had previously sold herself to earn money for his concert.
When the two meet by chance, Keigo takes her to his home where they spend the night together. Three months later, Masaki is delighted to receive a phone call from Keigo. But neither of them was aware of the fact that she had been infected with HIV.