Although Shoko is a strict teacher, behind the scenes she is also a lewd woman who secretly enjoys having a physical relationship with her student Takagi and having affairs at school. In a corner of the classroom. In the bathroom. Sex with her student, suppressing their voices so the other students don't find out, is stimulating and Shoko is completely captivated. However, as their play escalates in search of more thrills, Tsukagoshi from the same class finds out about her relationship with Takagi. Shoko desperately begs him not to tell anyone, but... Tsukagoshi smiles and says, "If you don't want me to tell anyone, do the same to me."