While Ayu and Izuru indulge in their usual intimate routines, they draw the attention of Kokone, who is struggling to study for an English test. After teasing her for her curiosity, Ayu and Izuru decide to initiate Kokone into their secret activities. Though initially reluctant, Kokone soon succumbs to the pleasure, resulting in a heated three-way encounter that ends abruptly when she remembers her academic responsibilities.