For his father's daily anger over his grades, his support for him was the existence of his stepmother Juri. He always stared at his mother-in-law, but one day he saw her enjoying Ayase with a stranger. In the figure of sucking lips and entwining tongues, a hot impulse that differs from disgust comes up. And, as if to recreate the glamorous sights seen in front of him, the noboru asked Juri for his tongue and contact.