After taking a gap year, Kiyoshi Naoto finally manages to land a spot at university. Finding a place in Tokyo is a struggle, though, so he ends up moving in with his older cousin, Luna. Naoto had a crush on Luna ever since he was young, and now his cousin is more mature and beautiful than ever! Night after night, he hears her scandalous moans, leaving him restless. She may have no shortage of partners, yet Luna starts getting closer to Naoto. As he tries to figure out just what his cousin is thinking, other sexy women seem to be flocking to him one after another! It’s the beginning of a new life, surrounded by seemingly promiscuous older women… (Source: Seven Seas Entertainment)