Hina Kinan, the serious and quiet student council president, is popular in her class. However, her true nature is hedonistic and perverted, and masturbating is her daily routine. Today, she sneaks out of the teacher and classmates' sight and masturbates under her desk during class. Afterwards, she sniffs a male student's briefs in an empty classroom and masturbates in a perverted way. However, a mysterious figure is filming the whole thing...