One of Reisen's duties is to act as an itinerant (traveling) apothecary (person who prepares and sells medicine and remedies). The interesting part about it is that she doesn't simply go door to door selling medicine on demand, but each household is instead consigned a medicine box by Eientei Pharmacy stocked with common remedies and medicines, which Reisen then inspects on a regular basis and only charges a fee for whatever medicine was used from the medicine box's stock. This system is commonly and more concisely known as "okigusuri".
Thanks and credits to nikgtasa for the cover page.
>"The interesting part about it is that she doesn't simply go door to door selling medicine on demand, but each household is instead consigned a medicine box by Eientei Pharmacy stocked with common remedies and medicines, which Reisen then inspects on a regular basis and only charges a fee for whatever medicine was used from the medicine box's stock."
For most guys that get Reisen's daily sex massage treatment, that medicine box typically consists of nothing but emtricitabine/tenofovir for HIV pre-exposure prophylaxis, azithromycin (or doxycycline) for gonorrhea/syphilis prophylaxis, and sildenafil for ED treatment.