Yobi infiltrates the school disguised as a student to find and rescue the alien but she quickly finds out that she really likes being human, making friends with the other students. This creates a complicated situation, because for Yobi to become a human permanently she must first steal the soul of another human that has fallen in love with her, which means killing him. Not that there is a shortage of people starting to love her, including a teacher who falls head-over-heels for Yobi when she disguises herself as a "human mother".
Meanwhile, one mysterious person is hunting her while another mysterious person keeps saving her. And in the forest nearby a portal to the afterlife opens and closes at every full moon...
