Dr. Makimura is a hospital-based medical investigator and physician dedicated to developing experimental infertility drugs. She created two fertility treatments: a blue pill for male sexual enhancement and a red pill for female sexual enhancement with aphrodisiac effects. Her work is driven by her own physiological condition—possessing both male and female reproductive organs yet being completely infertile, unable to impregnate or conceive.

To test these drugs, she covertly administers the red pill to nurses under her supervision while taking the blue pill herself. She meticulously records extreme physiological reactions and heightened sexual responses in her subjects, observing their sexual interactions to analyze outcomes. Over time, her focus shifts from scientific documentation to personal gratification. She increasingly participates in the sexual activities, prioritizing diverse sexual experiences over achieving viable fertility treatments, ultimately abandoning her research objectives for hedonistic pursuits.

Her background beyond her profession and physiological condition remains undocumented, as does any evolution or resolution concerning her infertility or ethical conflicts.