Naia, a lively dark-skinned girl raised in the southern seas, and Mano, her elegant white-skinned automaton (mechanical doll), form an unlikely but inseparable duo. Tasked with locating the vanished sun, they venture into the storm-shrouded Tower of the Mist. After their airship is damaged, they decide to explore the interior while making repairs.

The tower reveals itself as a vast, ever-changing labyrinth teeming with bizarre monsters and vengeful spirits. Naia is soon captured by a laid-back yet ruthless ghost maiden named Mary, who controls the dead and shows no mercy to intruders. As the cheerful “tanned energetic girl” and the cool “pale automaton” duo face peril, their contrasting personalities spark both hilarious banter and steamy encounters.

This first episode launches an erotic adventure full of exploration, monster battles, and intense hentai scenes featuring the charming heroines. Produced in collaboration with the popular doujin circle Shiganai Atelier (known for the original mega-scale RPG), the anime brings the beloved characters to life with adorable voices, seductive moans, and passionate action. The black-and-white mismatched pair’s lewd tower conquest begins here!

Based on the erotic doujin game by Shiganai Atelier (シガナイアトリエ).