[Machine Translation] Celebrating the 10th anniversary of the hit OVA "AIKa"! The legendary low-angle sexy action film returns in a completely new OVA series! This is the first volume of a three-volume release. Aika, a high school girl, is in a quest for a hidden treasure that lies at the bottom of the South Seas! And of course, it is full of mufufu scenes! In addition to the original staff of Studio Fantasia (original story and production), Katsuhiko Nishijima (director), Noriyasu Yamauchi (character design and animation director), and Kenichi Kanemaki (screenplay), Sanzigen of "Stratos Four", "The Last Weapon Girl" and "Reviving the Sky" fame has joined the project as the 3DCG director. The cast features popular voice actors such as Ami Koshimizu and Mamiko Noto! Episode 1 "Secret Game" is included. Special booklet "Adventure Bookmark 1" is included.