The deep, dark underworld is a place where remnants of technology abandoned long ago and traces of lost magic coexist. The advanced mechanical civilization of the thin underground and the mysterious soul energy of the deep underground have developed in different ways, but one day, the evil spirit Magellan, born in the deep ‘Raul’, begins to drive the entire underground into chaos. The influence extends to the sanctuary of light, Luminarie, and the ‘light’ in the underworld gradually disappears.
The player sets out on a journey to fight against Magellan’s darkness with the ‘Drill Girls’ gathered around Siren. Passionate warriors from the slums, mysterious beings wielding soul swords, survivors of toxic zones, ice wizards, mechanics, scientists, ninjas, and other unique girls have their own pasts, fighting styles, and goals, and purify the darkness with powerful drill weapons and unique abilities.
The game revolves around a unique worldview where action and strategy, science and magic, and the past and future intersect. As players explore each area, they experience battles that combine machinery and magic, and gradually get closer to the truth through the relationships and narratives between characters. The changing underground landscape and characters with different personalities provide players with a deep sense of immersion.