One Shot Bug Killer

HoiHoi-san, full title Ichigeki Sacchu!! HoiHoi-san (One-Shot Bug Killer!! Interceptor Doll HoiHoi-san), is a manga that spawned a PlayStation 2 game and a 10-minute OVA. In the year 20XX, insects have become immune to all pesticides. To combat the rising plague of cockroaches and other household pests, tiny, doll-like extermination androids known as "Hoihoi-san" are created. They can hunt down insects and kill them with miniaturized weapons, but they can also be treated as dolls, by dressing them up in costumes and buying accessories for them.