Marshmallow Imouto Succubus

Tsukikawa Keisuke had a strange dream. That dream involved his innocent younger sister, Saki. - Saki was a naïve girl who even believed that babies were made from just kissing. - However in his dream, Saki’s innocence was replaced by eyes filled with lust as she creeps into Keisuke’s bed. - The next day, Saki was her same innocent self to Keisuke’s relief. He was relieved that it was a merely a dream. - However, he soon learns from his father that a succubus lurks within his little sister. - Having to choose between his dear, innocent little sister and the allure of a lustful succubus, what will Keisuke do?​