The story revolves around an eccentric home tutor named Yoshimoto, who is hired to teach the second son of the Numata family. While being tossed around by the weird and unconventional tutor, a family gradually start changing.

Kazushige Numata and his wife Kayoko have two sons. The first son Shinichi studies well, but the second son Shigeyuki does not. Kazushige and Kayoko are worried about Shigeyuki, who might even fail to enter high school. Making things worse, Shigeyuki stays at home and don't go to school. Kazushige and his wife Kayoko finds an ad for a private tutor on the internet. They contact and then meet Yoshimoto (Sho Sakurai), who is the private tutor. During their meeting, both parties lays out one condition to work with each other. The father stipulates that Shigeyuki must go back to school within a week or Yoshimoto will be fired. Meanwhile, Yoshimoto stipulates that the parents must not interfere with his work. Yoshimoto's extraordinary teaching methods then influences not only Shigeyuki, but also his entire family.—AsianWiki