Disappearance."I... may have gotten carried away..." Since becoming a member of the student council, Rina's goal has been holding a student-run after party. She has continuously done everything she can to make it happen. After persuading the academy's teachers along with vice president Itsuki, they finally agree to allow it if all the students are for it. But just as everything seemed to be going well, something was happening under the surface. Rina visits Mika's room to investigate her disappearance. The room should be empty, but Aika is quietly standing there...