Sayaka gradually learns about the dark side of adulthood when one day she collapses during gym class. Her concerned teacher takes her home. Sayaka's parents are divorced, and she carries the emotional scars of sexual abuse from her father. That night, she undresses and reaches out to her teacher. Though he initially resists, his feelings slowly shift and he ends up making love to her. An absurd relationship between student and teacher begins, leading them into a forbidden romance. The emotions that blossom between them grow into a deep bond that can never be undone.