Throughout his life, Yukinari's smaller stature made him an easy target for bullying and mistreatment from girls. However, upon entering high school, he discovers he has a unique medical condition - hives break out on his skin when girls come into his personal space or touch him. One day, he is unexpectedly transported to Seiren, a mystical city located on a hidden world orbiting Earth that is primarily inhabited by women. With few men around, Yukinari is faced with a whole new set of challenges. Luckily, he finds comfort in his new friend Miharu-chan, whose touch has no adverse effects on him. His world is turned upside down once again, for better or for worse.