The primary character-Sakutaka Sodei will fail as part of his first knowledge about his lover who drank for the first time from past trauma. His erotic lesson literally putting on his body It was the facts of my sister 's Rika and cousin who offered cooperation to beat trauma. However, another sister / Japanese singer who made trauma in Sōtaka also taken part in the war, It is not just a lesson ...? My sister's brother fight starts now !!

Based on the visual novel Studio Erectlip. Alternative medieval fantasy world. The main character Princess knight Henriette together with his companion, the warrior Helga are captured by the robbers. The leader of the robbers is a rare pervert and a fan of huge Boobs, decided to find out for our heroines to whom of them to be his member's size.