A normal, albeit effeminate high school boy named Hazumu Osaragi is pressured by his friends Tomari Kurusu and Asuta Soro to confess his love to his friend Yasuna Kamiizumi, however, she rejects him. Hazumu takes this hard and climbs the nearby Mt. Kashima to try to forget what happened, but while on the mountain is seriously injured when an alien spacecraft crash lands on him. In order to rectify this, the alien revives Hazumu, but inadvertently turns him into a female, right down to the DNA level. Afterwards, the plot often revolves around whether Hazumu's new female body changes or does not change her relationships with her friends and loved ones. Throughout the series, a love triangle emerges between the three female main characters of Hazumu, Yasuna, and Tomari, Hazumu's childhood fri