In the year 2115, robots have become so affordable that even one individual can own them due to technological advances. Hundreds of years ago, a ``medicine seller in Toyama'' started providing ``one box of medicine for every family,'' but now it has become ``one android nurse for every family.'' Although the android nurses are inorganic, they are very popular because they can instantly cure human injuries and illnesses with their flawless diagnosis and handling, but it seems that there are rare cases of early batches that malfunction.