Naoto Kiyoshi is a young man who has just entered university after failing his entrance exams the previous year. Moving to Tokyo in search of a place to live, he ends up staying with Luna — an older relative he once had a huge crush on. But the Luna he had admired has changed... she’s grown into a stunning, sophisticated woman — and she’s way more promiscuous than he ever imagined?! Night after night, Naoto hears her moans echoing through the house, driving him crazy with desire. Her overly friendly attitude toward men leaves him flustered, and Naoto soon finds himself completely at her mercy. And just when things couldn’t get more complicated, more sensual, daring women start to enter his life! Thus begins Naoto’s thrilling, chaotic new university life — surrounded by seductive older women!