Yukinari Sasaki

Driven by a lifelong struggle with a severe allergy to women, this timid protagonist suffers from hives and physical collapse whenever he touches a female. His life changes forever when a bathtub accident transports him to Seiren, an alien realm where men are incredibly rare. While navigating this new world, he forms a unique bond with Miharu, the only girl who doesn't trigger his condition, all while constantly dodging the violent outbursts of the aggressive Kirie.