A continuation of the epic adventure of plucky Riko and Reg who are joined by their new friend Nanachi. Together they descend into the Abyss' treacherous fifth layer, the Sea of Corpses, and encounter the mysterious Bondrewd, a legendary White Whistle whose shadow looms over Nanachi's troubled past. Bondrewd is ingratiatingly hospitable, but the brave adventurers know things are not always as they seem in the enigmatic Abyss.
|Sound||Kevin Penkin||Original Music Composer|
|Visual Effects||Hiroko Oguri||Animation Director|
|Writing||Akihito Tsukushi||Original Series Creator|
|Visual Effects||Kazuhika Kise||Character Designer|
|Visual Effects||Hizoyuki Sata||Animation Supervisor|
|Visual Effects||Sayuri Sakimoto||Animation Director|