The "Sex Ticket"—an item exuding a premium vibe that Nil (a B-cup) whipped up rather haphazardly—is a dream pass that guarantees a hookup with anyone. Armed with this ticket and a "Boob Scouter," the protagonist, Naoya, sets out to track down the elusive "Boob Champion" somewhere in the city. Engaging in steamy, heated encounters with an even larger cast of beauties than in the first volume, Naoya pushes his stamina to the limit in epic battles of passion, eventually achieving glory. Yet, he soon realizes what he must sacrifice in return. This is the chronicle of the delightful, slightly embarrassing "boob harem" shared by him and the busty beauties surrounding him...!!