15 years after leaving home. Yuri, who was hit by the earthquake, decided to return to her parents' house at the invitation of her father. A reunion with Kazuki, a brother-in-law who admires Yuri, wraps the two in a nostalgic and sweet atmosphere. However, there was still the presence of a mean stepmother. Yuri, who lives the same painful days as before...Yuri's stepmother's mistress, Akiyama, was aiming for such a yuri. In addition, the dirty trap set by the stepmother. Kazuki, who knew that his longing sister-in-law was defiled, confessed all of his feelings, and...