Middle schooler Kon lives in a world with periodic exceptional phenomena, more commonly known as bugs. As the unofficial assistant of his landlady Kasane Himesaki, a leading researcher in the field, they study the effects and impact of these mysterious abnormalities. Some bring fun, others intrigue, and still others cause inconveniences to their daily lives, but one thing’s for sure-in a world like theirs, every morning may bring a new surprise!?