"Maybe I'm kissing the wrong way?" Yumi, worried about her boyfriend's attitude of not going beyond kissing, consults her boyfriend's father. Excited by the slightly erotic consultation from the high school girl, her father forcibly kisses her. Yumi is completely seduced by the bad breath typical of middle-aged men and the persistent tongue that, unlike her boyfriend, seeks her out. "An older man's kiss makes me melt..." After school that day, Yumi became addicted to kissing and began to seek her father's lips and seduced him wherever she went, even in front of her boyfriend...