Ever since seventeen-year-old Hodaka started dating his new girlfriend, his life has turned upside down. His girlfriend Chihaya--cute, sweet, and lovely as could be--has a family curse that turns him into a girl if they kiss! Despite their strange situation, Hodaka's feelings don't waver, and their relationship only continues to grow. But when Chihaya's cousin Mashiro kisses another guy, he too finds himself transformed! Just how are they going to stop Mashiro before she reveals their family secret to the whole world?!