Yuna Shiina, the Yuna Shiina who drives men crazy, appears in the no-panties teacher series. The lewd beauty teacher leads her male students to a sexual awakening with her pubic hair fluttering and her butt exposed. When she walks down the hallway, the boys lie down, when she picks up the chalk, the boys bend over. With no-panties preacher Yuna-sensei's bare-ass and bare-pussy class, the boys' crotches and grades will both improve!