The night of the class reunion (one night mistake) is the trigger... Tsumugi, who is about to get married, is approached by her ex-boyfriend at the class reunion... "I have a fiance..." "Just give me a little blowjob (lol)" "You really want to do it with me, don't you? (lol)" A woman who can't refuse and is weak to pressure. She lies to her fiance (boyfriend)... and has sex over and over again. Even though she hates him, they have good sexual chemistry... a former couple with great sexual stamina. They do it over and over again. "Your blowjobs are the best after all."