Deep under the ground of the capital city of Tokyo exists the forgotten and confined world called Tokyo Underground.

When Asagi Rumina encounters Ruri Sarasa, an escapee from the Underground, as well as her assistant Chelsea Rorec, he decides to protect them. But rather than attempting to bring Ruri back, the Underground's secret organization, Company, sends over intelligence personnel by the name of Supei.

Having fallen in love with Sarasa, will Rumina take on Supei in a battle to protect his love?

Source: AnimeNfo

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