In the near future, in a world where intelligent robots and people coexist.

In a corner of Sector Corporation, a robot manufacturer, there is a "Sexaroid Development Section" (a.k.a. "Sex Section") that produces robots that can perform sexual acts. Tsugumi, an industrial designer, and Ako, an office worker and sexaroid, both work in the Sexaroid Development Section, embark on a desperate attempt to create the "ultimate Sexaroid" to ensure the survival of the Section, which is ridiculed as a shameful part of the company because of its unprofitability!