This is the story of a boy, who became the lone Adam among four billion Eves. In a world where a pandemic has rendered all men impotent, high school...

Male college student Kazushi Sudou and his childhood friends, the Shirakawa sisters, end up bathing together.

The story follows teacher and veteran solo camper Kensuke, who forms a camping group with four girls.

Male student Souta Tsukishima begins working at his family's public bathhouse as a back washer. While concealing her true identity, Souta's classmate...