Collecting a strategic mana supply is important, so there's nothing to be ashamed of!" At the witch academy, girls receive special training in extracting mana from the semen of men. To ensure productive training, students are divided into boy-girl pairs. Mana is invaluable-it doubles a witch's power. Great witches are proficient in sperm harvesting techniques... Rina and Alice have just embarked on the thorny path of "mana collectors.