Former announcer and refreshing exclusive older sister Chisato Ugaki becomes a female teacher! Chisato is a new teacher who has just been assigned to a boys' school. Although she has little experience with men, she volunteers for a naughty reverse class to learn about the male Kokoro! A senior teacher gives blowjob instruction, a promiscuous student teaches her sex, and a virgin student teaches her handjob practice! Thanks to her training, she has grown into a naughty teacher who surprises her students and gets them fully erect! A brave and naughty teacher tries her best in a total of 5 corners and 3 scenes!