Nantai Prima Onna Kyoushi

Shuichi, the main character, lives a lazy, uneventful life. Aika Shirasagi, his Japanese language teacher, teaches his class with a gentle smile. But when Shuichi hurts her pride, Aika finds herself unable to resist his escalating demands. Though her mind worries, her body grows more submissive with each encounter, plunging into depraved acts. Shuichi, in turn, is captivated by Aika's incredibly flexible body that seems to open endlessly. Their day-and-night activities slowly transform into a passionate, burning ritual.