A female student is studying in her room with her tutor. It was an ordinary study scene, no different from usual. But one day, a trivial incident causes the tutor to suddenly change his behavior! The tutor quietly begins to blame the female student... The female student is frightened by her unusual tutor and is weak-willed, unable to resist when he touches her body, and the innocent female student's cotton panties gradually become wet. Even though she doesn't want to, she feels it and gets deeper and deeper into the mud. Finally, she accepts the tutor's dick herself and becomes addicted to the pleasure!