After seeing Izumi fawn over Ryusuke's extended blues session, Koyuki is determined to practice like a madman on the dusty old acoustic guitar Ryusuke gives him. Later at a bar, Ryusuke suggests a tryout for a position in his new band between Koyuki and potential singer Chiba, a fiery hot-head. When Koyuki begins learning and practicing for this duel, he winds up joining a Beatles cover band that is partaking in a Battle of the Bands festival. Koyuki nervously joins, as the loser will be forced to strip naked! When Maho tags along for the festival, will the night end in steamy skinny-dipping action between Maho and Koyuki?