Unmotivated high school teacher Shizuka (Hirose Alice) is now having love trouble in her classroom! After school, Shizuka witnesses a date between two students from her class, Hata Rintaro (Hamura Hitonari) and Ando Yurina (Shida Kohaku). However, Rintaro is dating Oota Riko (Arai Miu) from the same class... Riko is furious that he cheated on her! Meanwhile, Yurina is unconcerned and says, "Is it wrong to fall in love with someone who has a partner?", which leads to a big argument! Furthermore, an affair between two teachers is discovered! Shizuka tries to calm the situation, but ends up inviting the worst possible outcome...