In a near future, an illness called "Cagaster" made ​​its appearance. It turns humans into insects. The story begins 30 years after the onset of the illness, in 2125. It follows the adventures of Kidou, a boy who fights insects.

Light showers accompany falling cherry blossoms as they flood the view of another April morning, marking the start of a new school year for students Homi Moegi, Ren Aikawa, and Yua Nakabeni. Discovering that they all share the same class, the three playfully reunite as the new semester begins. Starting another important time of their lives, the girls deepen their friendship through laughter, happiness, sadness, and all other struggles that come their way—all the while wearing dazzling, silky nylon tights. [Written by MAL Rewrite]

A poor and ordinary boy from a village joins a minor sect in Jiang Hu and becomes an Unofficial Disciple by chance. How will Han Li, a commoner by birth, establish a foothold for himself in in his sect? With his mediocre aptitude, he must successfully traverse the treacherous path of cultivation and avoid the notice of those who may do him harm. This is a story of an ordinary mortal who, against all odds, clashes with devilish demons and ancient celestials in order to find his own path towards immortality.

The psychologist Ryou and his cheerful nurse Asuna explain many aspects of mental illness to the reader. They cover topics such as the validity, prevalence, and origins of mental disorders, in addition to addressing specific disorders. The information is imparted in a cheerful and comic manner, with various jokes, puns, and pop culture references. (Source: MU)