一击杀虫!! 小惠惠 LEGACY

In the year 20XX, pests have developed resistance to all insecticides. To combat them, the Japanese company Mars Pharmaceutical developed an ultra-small pest-extermination robot—HOIHOI. 　　 The original manga sequel, "One-Shot Extermination!! HoiHoi-san LEGACY," includes an anime DVD with the tankōbon volume.