When the card collector arrives in another world, he discovers that all the cards he needs to collect are beautiful girls. "Welcome to the true Great Millennium World!" — "Collect your own cards and challenge the will of the world!" — "Let me introduce myself, my name is Itsuka Shiori, a second-year student at Zen High School. What about you?" — "Collection target discovered: Itsuka Shiori. Card strength: 1 star (Can???)" — Intimacy? Embarrassment? Loyalty? Trust? What the hell are you trying to do?! Shikimori Kaede's collection challenge officially begins! Infinite flow, crossover anime, quick transmigration, multiple dungeons, not all combat.