DAYS WITH MY STEPSISTER NOVEL SC (2025)

Infected by the magic of Halloween night, Yuuta and Saki sought out each other's warmth. Though it might look the same to those around them, their relationship has undergone a definite change. As they pass their first winter together, including its various celebrations, they struggle to balance communication and the joy of surprise. How can they make each other happy, and where are they headed? Are marriage and children in their future, or something else entirely?

Yuuta and Saki begin a secret double life and a relationship they can't name-they're still siblings, but they're also teens in love. Going on their first date, getting into fashion, attending a friend's birthday party, celebrating Halloween. They've lived their lives without expecting anything from others, but as they spend more and more time together, those feelings begin to change. And gradually, the people around them start to notice...