The main character has been a "ronin”—someone who still can’t get into college—for two years now. He has nowhere to turn, but he just can’t seem to focus on his studies. Every time, someone distracts him. This time, he meets a stunning beauty, but realizes that right now he needs to focus solely on his exams; besides, he doesn’t believe that such an attractive girl would even notice him.

However, the girl is the first to strike up a conversation with the protagonist and offers to be friends. They quickly grow close, and soon she openly suggests they have sex. The protagonist can’t resist her passionate advances. Thus begin his sleepless days of nonstop sex. Contrary to her modest appearance, she turns out to be incredibly uninhibited and insatiable in bed, begging him to give up his studies for the sake of carnal pleasures. The protagonist is tormented by thoughts of the future, but his irresistible attraction to his partner leaves him no chance of returning to his cramming.