Tanaka (voiced by Kensho Ono) is a student in Class 1-F. He is weak and has a delicate face like a girl. He speaks softly and often falls asleep in the middle of a talk because of exhaustion. Tanaka is always in a daze and sleepy, and he has nothing to do with any troubles in life. Ota (voiced by Yoshimasa Hosoya), who looks a bit fierce, is often mistaken for a bad boy, but in fact, he serves as a "nanny" around Tanaka, taking good care of him in life and enjoying it. The lively and cheerful girl Miyano (voiced by Takamori Nazumi) has always had a crush on the big sister Echizen (voiced by Ayaka Suwa). In order to become a companion who matches Echizen, Miyano worships Tanaka as a teacher and learns from him the way of steady laziness. A daily life full of joy begins.