The story greatly resembles 3 nen B gumi Kinpachi Sensei with some stereotypical characters tacked on. There's the hardheaded father figure, who is a ramen shop chef, his tough school teacher daughter, Motoko, who hates Sakuragi, and an estranged older sister, whose dad disowned. Dad is renting out the estranged sister's old room to Sakuragi. Motoko and Sentaro's colleague, Onodera, has a huge Oedipus complex.