Hana is worried about her English grades, so Michael, a colleague of Hana's mother, agrees to be her tutor for a low price. While Hana is tutoring Michael in his room, Hana accidentally spills tea on Michael's crotch. As she hurriedly wipes it up, Hana's huge breasts make Michael's huge dick fully erect. Captivated by the size and thickness of the dick, Hana takes it in her mouth, saying she will take responsibility for making it erect. She then becomes obsessed with the big dick, which is different from her boyfriend's small one...