Kana is a lesbian (homosexual) and Miho is bisexual (bisexual). It has been five years since the two broke up due to differences in their personalities, but Kana still thinks about Miho. Then, Kana receives some bad news. "Miho has gotten married." Kana's hopes of spending those happy times together again are dashed, and she vows to Kokoro to "get revenge" on Miho... And so, Kana uses a private detective agency to track down Miho's love nest...