Kimiko works in a Kyoto pharmacy frequented by Aburatsubo-kun, selling bug killing robots and accessories. She wants a robot doll but cannot stomach the carnage. (Wikipedia)

The time is the near future. Cockroaches and other household pests have become immune to all forms of insecticides. In response to this crisis, a Japanese company has created small, doll-like, insect exterminating robots called Hoi Hoi-san. A competing company has also released their own version, Combat-san. Because of their adorable appearance, these little robots have become somewhat of a phenomenon and have gained many fans. Late at night, in the home of one such fan, Hoi Hoi-san and Combat-san search for insects to exterminate... but Combat-san is not above trying to exterminate Hoi Hoi-san while she's at it. 

In the 21st century, bugs have become immune to all pesticides. To combat them, the corporations of Japan have developed a new remedy: HoiHoi-San, a robotic exterminator. She's tiny, she's cute, she's deadly. 
<br><br>
(Source: Anime News Network)

Kimiko Dewa